fix: bd onboard hangs on Windows (GH #531)

Added onboard and hooks commands to the noDbCommands list so they
skip database and daemon initialization. These commands don't need
database access - they just output documentation or manage git hooks.

On Windows, if no .beads directory exists, the PersistentPreRun
would attempt database discovery (including git worktree detection)
which could hang due to git command issues.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cmd/bd/main.go

@@ -215,8 +215,10 @@ var rootCmd = &cobra.Command{
 			"doctor",
 			"fish",
 			"help",
+			"hooks",
 			"init",
 			"merge",
+			"onboard",
 			"powershell",
 			"prime",
 			"quickstart",