Add homepage field to Cargo.toml linking to https://univerlab.org/gitkit.
crates.io renders this as a clickable link in the sidebar. Add corresponding
link in README for discoverable visitors.

Add Repository locks and Version check & self-update features to README
Features section. Update CLI Reference to document --push, --all flags
for gitkit lock, and --json flag for gitkit lock status.

Repository locks block commits and pushes during agent sessions via
pre-commit and pre-push hooks. Version check queries GitHub for newer
releases and can be disabled with GITKIT_NO_UPDATE_CHECK environment
variable.

Add comprehensive documentation for push-blocking feature shipped in
commit 6a48cc2. Includes:
- Examples for --push and --all flags
- Explanation of pre-push hook mechanics
- Per-operation status output (commit/push locked separately)
- Updated bypass documentation for git push --no-verify

Previously, docs/lock.md only covered commit-blocking, leaving half the
feature undocumented.

Document the automatic version check and self-update mechanism shipped in
commit 6a48cc2. Includes:
- Self-update section in Installation guide
- GITKIT_NO_UPDATE_CHECK environment variable to opt out
- Cargo-managed install handling (points to cargo install --force)
- Binary-in-place update behavior

Also update index.md to reflect current capabilities:
- Agent lock now blocks commits and/or pushes (not just commits)
- Add self-update to the feature list
- Update documentation guide to mention automatic self-updates

Add no-body commit-msg hook that rejects messages with a body, accepting
only a single-line subject (plus optional BREAKING CHANGE footer). Fix
conventional-commits to accept ! before the colon and to validate only
the first line.

Detect hooks that exist but are not executable (dormant) — the state
that caused four months of silent hook failures across seven repos.
Classify each hook as active/dormant/modified/absent, with explicit
language telling the user git ignores a dormant hook. --repair sets the
executable bit on dormant hooks without touching content; --strict exits
non-zero for CI. No new dependencies.

…tcher

…ping

…o agentic template

…rmat check