Add metadata to published plugins

Issue gh-13

Author: sjohnr

maven-plugin/spring-security-maven-plugin.gradle

@@ -4,9 +4,14 @@ plugins {
 }
 
 gradlePlugin {
+	website = "https://github.com/spring-io/spring-security-release-tools/maven-plugin"
+	vcsUrl = "https://github.com/spring-io/spring-security-release-tools.git"
 	plugins {
 		springSecurityMavenPlugin {
 			id = "io.spring.security.maven"
+			displayName = "Spring Security Maven Plugin"
+			description = "Spring Security Maven Plugin is a Gradle plugin that provides tasks for publishing releases to Maven Central (Sonatype) and Spring (Artifactory) repositories."
+			tags.addAll("spring", "maven", "nexus", "artifactory")
 			implementationClass = "io.spring.gradle.plugin.maven.SpringMavenPlugin"
 		}
 	}

release-plugin/spring-security-release-plugin.gradle

@@ -5,9 +5,14 @@ plugins {
 }
 
 gradlePlugin {
+	website = "https://github.com/spring-io/spring-security-release-tools/release-plugin"
+	vcsUrl = "https://github.com/spring-io/spring-security-release-tools.git"
 	plugins {
 		springSecurityReleasePlugin {
 			id = "io.spring.security.release"
+			displayName = "Spring Security Release Plugin"
+			description = "Spring Security Release Plugin is a Gradle plugin that provides common tasks for automating Spring releases."
+			tags.addAll("spring", "github", "release")
 			implementationClass = "io.spring.gradle.plugin.release.SpringReleasePlugin"
 		}
 	}
@@ -37,4 +42,4 @@ dependencies {
 shadowJar {
 	archiveClassifier = ""
 	relocate "com.fasterxml", "shaded.com.fasterxml"
-}
+}