fix: pin ratatui ecosystem deps to compatible versions

tui-tree-widget 0.24 depends on ratatui-core/ratatui-widgets (ratatui
0.30 ecosystem), while tui-textarea 0.6 depends on ratatui 0.28. This
caused two incompatible versions of ratatui to coexist, resulting in
type mismatches for Block and Widget traits.

Pin ratatui to 0.29, tui-tree-widget to 0.23, tui-textarea to 0.7, and
crossterm to 0.28 so that all crates share the same ratatui version.

Author: fioncat

.gitignore

@@ -13,3 +13,5 @@ target/
 # Added by cargo
 
 /target
+
+/.vscode