Relocate projects to spring-boot-project

Move projects to better reflect the way that Spring Boot is released.

The following projects are under `spring-boot-project`:

  - `spring-boot`
  - `spring-boot-autoconfigure`
  - `spring-boot-tools`
  - `spring-boot-starters`
  - `spring-boot-actuator`
  - `spring-boot-actuator-autoconfigure`
  - `spring-boot-test`
  - `spring-boot-test-autoconfigure`
  - `spring-boot-devtools`
  - `spring-boot-cli`
  - `spring-boot-docs`

See gh-9316

spring-boot-project/spring-boot-cli/src/test/resources/grab-samples/customDependencyManagement.groovy

@@ -0,0 +1,5 @@
+@DependencyManagementBom('test:child:1.0.0')
+@Grab('ejb-api')
+class CustomDependencyManagement {
+
+}

spring-boot-project/spring-boot-cli/src/test/resources/grab-samples/duplicateDependencyManagementBom.groovy

@@ -0,0 +1,5 @@
+@DependencyManagementBom("foo:bar:1.0")
+@DependencyManagementBom("alpha:bravo:2.0")
+class DuplicateDependencyManagement {
+
+}

spring-boot-project/spring-boot-cli/src/test/resources/grab-samples/grab.groovy

@@ -0,0 +1,4 @@
+@Grab('joda-time')
+class GrabTest {
+
+}

spring-boot-project/spring-boot-cli/src/test/resources/grab-samples/repository/test/child/1.0.0/child-1.0.0.pom

@@ -0,0 +1,13 @@
+<project>
+	<parent>
+		<groupId>test</groupId>
+		<artifactId>parent</artifactId>
+		<version>1.0.0</version>
+	</parent>
+
+	<artifactId>child</artifactId>
+	<version>1.0.0</version>
+	<packaging>pom</packaging>
+
+	<modelVersion>4.0.0</modelVersion>
+</project>

spring-boot-project/spring-boot-cli/src/test/resources/grab-samples/repository/test/parent/1.0.0/parent-1.0.0.pom

@@ -0,0 +1,18 @@
+<project>
+	<groupId>test</groupId>
+	<artifactId>parent</artifactId>
+	<version>1.0.0</version>
+	<packaging>pom</packaging>
+
+	<modelVersion>4.0.0</modelVersion>
+
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>javax.ejb</groupId>
+				<artifactId>ejb-api</artifactId>
+				<version>3.0</version>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+</project>