Streamline and refactor the azure and the azure-web adapters.

- Add SCF/Azure Gradle sample and docs.
- Move the function-azure-di-samples into standalone projects.
 - Apply the name convetion and project structure for the SCF adaptes.
   E.g.  function-sample-azure-XXX projects under the spring-cloud-function-samples root.
 - Remove the redudant samples.
 - Improve the samples docs and the Adapter generic docs.
- Streamline docs.
- Add azure web adapter sample and README.
- Add Spring Azure Functions banner for azure and azure web adapters.
- azure-web adapter fixes:
  - Fix issues in serverles-web ProxyHttpServletResponse implementation.
  - Remove the custom FunctionClassUtils utils in favor of scf-context/util/FunctionClassUtils.
- Remove redundant files.
- Add FunctionInvoker deprecation annotations.
- Extend the time trigger sample with Retry policies example.

spring-cloud-function-samples/function-sample-azure-web/src/main/java/com/example/azure/web/AzureWebDemoApplication.java

@@ -0,0 +1,15 @@
+package com.example.azure.web;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+
+@SpringBootApplication
+@EnableJpaRepositories
+public class AzureWebDemoApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(AzureWebDemoApplication.class, args);
+	}
+
+}

spring-cloud-function-samples/function-sample-azure-web/src/main/java/com/example/azure/web/Country.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2023-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.azure.web;
+
+import java.util.Objects;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+/**
+ *
+ * @author Christian Tzolov
+ */
+
+@Table(name = "COUNTRIES")
+@Entity
+public class Country {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    private String name;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o)
+            return true;
+        if (o == null || getClass() != o.getClass())
+            return false;
+        Country country = (Country) o;
+        return id == country.id && name.equals(country.name);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, name);
+    }
+
+    @Override
+    public String toString() {
+        return "Country{" +
+          "id=" + id +
+          ", name='" + name + '\'' +
+          '}';
+    }
+}

spring-cloud-function-samples/function-sample-azure-web/src/main/java/com/example/azure/web/CountryController.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2023-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.azure.web;
+
+import java.util.stream.Collectors;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.util.StringUtils;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ *
+ * @author Christian Tzolov
+ */
+@RestController
+public class CountryController {
+
+	@Autowired
+	private CountryRepository countryRepository;
+
+	@GetMapping("/")
+	public String index() {
+		return "Country Count: " + countryRepository.count();
+	}
+
+	@GetMapping("/countries")
+	public String allCountries() {
+		String countries = this.countryRepository.findAll().stream()
+				.map(country -> country.toString())
+				.collect(Collectors.joining());
+
+		return "Countries: " + countries;
+	}
+
+	@PostMapping(path = "/countries")
+	public Country addCountry(@RequestBody Country country) {
+		if (!StringUtils.hasText(country.getName())) {
+			return null;
+		}
+		return this.countryRepository.save(country);
+	}
+
+	@GetMapping("/countries/{id}")
+	public Country countryById(@PathVariable Integer id) {
+		return this.countryRepository.findById(id).get();
+	}
+}

spring-cloud-function-samples/function-sample-azure-web/src/main/java/com/example/azure/web/CountryRepository.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2023-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.azure.web;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+/**
+ *
+ * @author Christian Tzolov
+ */
+public interface CountryRepository extends JpaRepository<Country, Integer> {
+}