feat(tui): add self-documenting help with ASCII diagrams and table helpers

TUI improvements for Christmas launch:
- Add phase transition table and lifecycle diagram to `gt molecule --help`
- Add swarm lifecycle diagram to `gt swarm --help`
- Add mail routing diagram to `gt mail --help`
- Add sling mechanics diagram to `gt sling --help`
- Create Lipgloss table helper (internal/style/table.go)
- Migrate mq_list to use styled tables with color-coded priorities
- Migrate molecule list to use styled tables
- Add fuzzy matching "did you mean" suggestions for polecat not found errors
- Add suggest package with Levenshtein distance implementation

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

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

internal/cmd/session.go

@@ -15,6 +15,7 @@ import (
 	"github.com/steveyegge/gastown/internal/rig"
 	"github.com/steveyegge/gastown/internal/session"
 	"github.com/steveyegge/gastown/internal/style"
+	"github.com/steveyegge/gastown/internal/suggest"
 	"github.com/steveyegge/gastown/internal/tmux"
 	"github.com/steveyegge/gastown/internal/workspace"
 )
@@ -212,7 +213,9 @@ func runSessionStart(cmd *cobra.Command, args []string) error {
 		}
 	}
 	if !found {
-		return fmt.Errorf("polecat '%s' not found in rig '%s'", polecatName, rigName)
+		suggestions := suggest.FindSimilar(polecatName, r.Polecats, 3)
+		hint := fmt.Sprintf("Create with: gt polecat add %s/%s", rigName, polecatName)
+		return fmt.Errorf("%s", suggest.FormatSuggestion("Polecat", polecatName, suggestions, hint))
 	}
 
 	opts := session.StartOptions{