feat(build): add release automation tasks and CI/CD workflows

- Introduced Gradle tasks for release preparation, version bumping, and git tagging.
- Added CI workflow for continuous integration on pushes and pull requests.
- Implemented release workflow for automated builds and Gitea releases upon tag pushes.
- Created scripts for manual release processes on Windows and Linux/macOS.
- Documented the release process and Gitea Actions setup in the new RELEASE.md and setup-gitea-actions.md files.

build.gradle

@@ -3,6 +3,7 @@ plugins {
     id 'idea'
     id 'maven-publish'
     id 'net.minecraftforge.gradle' version '[6.0,6.2)'
+    id 'org.ajoberstar.grgit' version '5.2.0'
 }
 
 version = mod_version
@@ -197,3 +198,83 @@ publishing {
 tasks.withType(JavaCompile).configureEach {
     options.encoding = 'UTF-8' // Use the UTF-8 charset for Java compilation
 }
+
+// Release automation tasks
+task prepareRelease {
+    dependsOn 'build'
+    group = 'release'
+    description = 'Prepares release files and creates git tag'
+    
+    doLast {
+        def tagName = "v${mod_version}"
+        def jarFile = file("${buildDir}/libs/${mod_id}-${mod_version}.jar")
+        
+        if (!jarFile.exists()) {
+            throw new GradleException("JAR file not found: ${jarFile}")
+        }
+        
+        println "Release prepared:"
+        println "  Tag: ${tagName}"
+        println "  JAR: ${jarFile}"
+        println ""
+        println "Next steps:"
+        println "1. Push the tag: git push origin ${tagName}"
+        println "2. Create release on Gitea manually or use Gitea Actions"
+    }
+}
+
+// Task to create a git tag
+task createTag {
+    doLast {
+        def tagName = "v${mod_version}"
+        try {
+            grgit.tag.add(name: tagName, message: "Release ${tagName}")
+            println "Created tag: ${tagName}"
+        } catch (Exception e) {
+            println "Tag ${tagName} might already exist: ${e.message}"
+        }
+    }
+}
+
+// Task to push tags
+task pushTags {
+    doLast {
+        try {
+            grgit.push(tags: true)
+            println "Pushed tags to remote"
+        } catch (Exception e) {
+            println "Error pushing tags: ${e.message}"
+        }
+    }
+}
+
+// Combined release task
+task release {
+    dependsOn 'createTag', 'pushTags', 'prepareRelease'
+    group = 'release'
+    description = 'Creates a git tag, pushes it, and prepares for Gitea release'
+}
+
+// Task to bump version
+task bumpVersion {
+    doLast {
+        def currentVersion = mod_version
+        def versionParts = currentVersion.split('\\.')
+        def major = versionParts[0] as Integer
+        def minor = versionParts[1] as Integer
+        def patch = versionParts[2] as Integer
+        
+        // Increment patch version
+        patch++
+        def newVersion = "${major}.${minor}.${patch}"
+        
+        // Update gradle.properties
+        def propsFile = file('gradle.properties')
+        def propsContent = propsFile.text
+        propsContent = propsContent.replaceAll("mod_version=${mod_version}", "mod_version=${newVersion}")
+        propsFile.text = propsContent
+        
+        println "Version bumped from ${currentVersion} to ${newVersion}"
+        println "Don't forget to commit and push the version change!"
+    }
+}