feat(hooks): make template hooks sync.branch aware (bd-8ib)

Update the embedded template hooks (used by bd init) to also check
for sync.branch configuration. This complements the earlier update
to examples/git-hooks/.

Changes:
- templates/hooks/pre-push: Skip uncommitted check when sync.branch set
- templates/hooks/pre-commit: Skip flush/staging when sync.branch set
- Bump version to 0.27.1 for all hooks
- Add sync.branch hooks change to --whats-new

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

cmd/bd/version.go

@@ -14,7 +14,7 @@ import (
 
 var (
 	// Version is the current version of bd (overridden by ldflags at build time)
-	Version = "0.27.0"
+	Version = "0.27.1"
 	// Build can be set via ldflags at compile time
 	Build = "dev"
 	// Commit and branch the git revision the binary was built from (optional ldflag)