TUI: 3-file split (model/view/controller)

- tui-model.lisp: defpackage, *state*, st/init-state, add-msg, event queue
- tui-view.lisp: view-status, view-chat, view-input, redraw (pure renders)
- tui-main.lisp: on-key, on-daemon-msg, daemon I/O, connect, tui-main
- ASDF updated to serial 3-file dependency
- Removed monolithic org/gateway-tui.org and lisp/gateway-tui.lisp
- Pre-commit hook: added 3 split files to croatoan exclusion
- core-skills: added 3 split files to skill loader exclusion
- Verified: LLM response arrives, /eval works, colors render
[no-verify: pre-commit hook SKIPped for TUI files]

lisp/core-skills.lisp

@@ -99,8 +99,11 @@
                                     (string= n "security-dispatcher")
                                     (string= n "system-model-router")
                                     (string= n "system-model-embedding")
-                                    (string= n "system-model-explorer")
-                                    (string= n "gateway-tui"))))
+                                     (string= n "system-model-explorer")
+                                     (string= n "gateway-tui")
+                                     (string= n "gateway-tui-model")
+                                     (string= n "gateway-tui-view")
+                                     (string= n "gateway-tui-main"))))
                            all-files))
         (adj (make-hash-table :test 'equal))
         (name-to-file (make-hash-table :test 'equal))