Add primary command sample

- New spring-shell-sample-catalog which is a skeleton meant for
  future view overhaul work.
- Relates #755

spring-shell-samples/spring-shell-sample-catalog/spring-shell-sample-catalog.gradle

@@ -0,0 +1,39 @@
+plugins {
+	id 'org.springframework.shell.sample'
+	id 'org.springframework.boot'
+	id 'org.graalvm.buildtools.native'
+}
+
+description = 'Spring Shell Sample Catalog'
+
+dependencies {
+	management platform(project(":spring-shell-management"))
+	implementation project(':spring-shell-starters:spring-shell-starter-jna')
+	testImplementation project(':spring-shell-starters:spring-shell-starter-test')
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testImplementation 'org.awaitility:awaitility'
+}
+
+springBoot {
+	buildInfo()
+}
+
+if (project.hasProperty('springShellSampleE2E') && springShellSampleE2E.toBoolean()) {
+	bootJar {
+		archiveName = "$baseName.$extension"
+	}
+}
+
+graalvmNative {
+	metadataRepository {
+		enabled = true
+	}
+	binaries {
+		main {
+			if (project.hasProperty('springShellSampleMusl') && springShellSampleMusl.toBoolean()) {
+				buildArgs.add('--static')
+				buildArgs.add('--libc=musl')
+			}
+		}
+	}
+}

spring-shell-samples/spring-shell-sample-catalog/src/main/java/org/springframework/shell/samples/catalog/CatalogCommand.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 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 org.springframework.shell.samples.catalog;
+
+import org.springframework.shell.command.annotation.Command;
+import org.springframework.shell.command.annotation.Option;
+
+@Command
+public class CatalogCommand {
+
+	@Command
+	String catalog(
+		@Option() String arg
+	) {
+		return String.format("Hi arg=%s", arg);
+	}
+}

spring-shell-samples/spring-shell-sample-catalog/src/main/java/org/springframework/shell/samples/catalog/CatalogConfiguration.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright 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 org.springframework.shell.samples.catalog;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.shell.command.annotation.CommandScan;
+
+@Configuration
+@CommandScan
+class CatalogConfiguration {
+}

spring-shell-samples/spring-shell-sample-catalog/src/main/java/org/springframework/shell/samples/catalog/SpringShellApplication.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 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 org.springframework.shell.samples.catalog;
+
+import org.springframework.boot.Banner.Mode;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringShellApplication {
+
+	public static void main(String[] args) throws Exception {
+		SpringApplication application = new SpringApplication(SpringShellApplication.class);
+		application.setBannerMode(Mode.OFF);
+		application.run(args);
+	}
+
+}

spring-shell-samples/spring-shell-sample-catalog/src/main/resources/application.yml

@@ -0,0 +1,18 @@
+spring:
+  main:
+    banner-mode: off
+  shell:
+    noninteractive:
+      primary-command: catalog
+## disable console logging
+logging:
+  pattern:
+    console:
+## log debug from a cli
+#  file:
+#    name: shell.log
+#  level:
+#    root: debug
+#    org:
+#      springframework:
+#        shell: debug