feat(release): add gastown-release molecule formula

Adds a workflow formula for Gas Town releases with:
- Workspace preflight checks (uncommitted work, stashes, branches)
- CHANGELOG.md and info.go versionChanges updates
- Version bump via bump-version.sh
- Local install and daemon restart
- Error handling guidance for crew vs polecat execution

internal/workspace/find.go

@@ -48,10 +48,12 @@ func Find(startDir string) (string, error) {
 			primaryMatch = current
 		}
 
-		if secondaryMatch == "" {
-			if info, err := os.Stat(filepath.Join(current, SecondaryMarker)); err == nil && info.IsDir() {
-				secondaryMatch = current
-			}
+		// Always keep updating secondaryMatch to find the outermost mayor/ directory.
+		// This handles nested structures where rigs have their own mayor/ directories
+		// but only the town root should be detected as the workspace.
+		// The primary marker (mayor/town.json) is authoritative and returns early above.
+		if info, err := os.Stat(filepath.Join(current, SecondaryMarker)); err == nil && info.IsDir() {
+			secondaryMatch = current
 		}
 
 		parent := filepath.Dir(current)