revert: remove cargo-workspaces, use sed for version update

feat: use cargo-workspaces for Rust workspace version management

fix: use time-based filtering for version calculation

fix: use merge commit for release PRs and improve version calculation

fix: use target branch diff for version calculation instead of tag

fix: merge target branch before creating release to prevent CHANGELOG conflicts

feat: add strict SemVer validation with clear error messages

fix: improve version parsing to handle mixed tag formats

docs: add supported version files table and release flow diagram

feat: add support for major package managers

chore: add test workflow

feat: initial release of create-release-pr action

Initial commit