feat(omo-claude): port ultragoal to per-session file-based goals

Goal content under ./.omo/ultragoal/sessions/claude-<id>/ keyed by Claude Code
session_id (claude: prefix); UltragoalScope struct threaded; plan version 2 +
index.json registry with read-only v1 forward-migration (never deletes v1);
create_goal/get_goal/update_goal dependency dropped (file/steering-based); the
PreToolUse create_goal budget guard kept compiled+unit-tested but its hooks.json
registration removed (inert in CC). 26 tests pass. ultragoal removed from
sync-components HANDLED set — it is a hand-fork, not patch-synced.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/omo-claude/plugin/scripts/sync-components.mjs

@@ -39,9 +39,12 @@ export const HANDLED_COMPONENTS = [
 	"comment-checker",
 	"lsp",
 	"ultrawork",
-	"ultragoal",
 	"start-work-continuation",
 ];
+// NOTE: `ultragoal` is intentionally NOT sync-managed. It is a deep hand-fork
+// (per-session `.omo/ultragoal` refactor, `claude:` session scoping, inert
+// create_goal guard) that diverges from the omo-codex source, so it is
+// maintained directly in this tree rather than regenerated from a patch manifest.
 
 // Per-component copy surface. Directories are copied recursively; files are
 // copied verbatim. Entries that do not exist in the source are skipped.