Summary

Add automated release workflows for version bumping and post-release tasks.

Bump Version (bump-version.yml)

• Manual trigger via workflow_dispatch with version input
• Validates version format and checks current version is SNAPSHOT
• Creates a PR to update gradle.properties

Post Release (post-release.yml)

• Triggered automatically when a release/v* PR is merged to main
• Creates a version tag (e.g., v0.2.0)
• Creates a release branch (e.g., 0.2.x) with the next patch SNAPSHOT
• Opens a follow-up PR to bump main to the next minor SNAPSHOT

Flow

1. [manual]    Actions tab → "Bump Version" → enter version (e.g., 0.2.0)
               → PR #1: "Bump version to 0.2.0"
2. [manual]    Merge PR #1
               → (automatic) tag v0.2.0
               → (automatic) create 0.2.x branch (0.2.1-SNAPSHOT)
               → (automatic) PR #2: "Bump version to 0.3.0-SNAPSHOT"
3. [manual]    Merge PR #2
               → main is now 0.3.0-SNAPSHOT

Test plan

• Run "Bump Version" workflow manually and verify PR is created with correct version
• Merge the PR and verify post-release creates tag, release branch, and follow-up PR
• Merge the follow-up PR and verify main is bumped to the next SNAPSHOT