.tmuxp.yaml(chore): Update to use just commands

why: Align development workflow with new justfile
what:
- Replace make commands with just equivalents
- Update shell commands to use just test, just start, etc.

Author: tony

.tmuxp.yaml

@@ -11,8 +11,8 @@ windows:
   panes:
   - focus: true
   - pane
-  - make watch_mypy
-  - make watch_test
+  - just watch-mypy
+  - just watch-test
 - window_name: docs
   layout: main-horizontal
   options:
@@ -22,4 +22,4 @@ windows:
   - focus: true
   - pane
   - pane
-  - make start
+  - just start