chore: update dependencies and project configuration

- Align tree-sitter dependencies to latest versions (bash 0.25.1, cli 0.25.10)
- Clean up .gitignore redundant patterns and normalize path styles
- Improve CodeRabbit configuration with path filters and simplified instructions
- Add test corpus exclusion to match project intent

.gitignore

@@ -34,17 +34,14 @@
 [._]s[a-rt-v][a-z]
 [._]ss[a-gi-z]
 [._]sw[a-p]
-coverage
-megalinter-reports
-node_modules
-npm-debug.log
+coverage/
+megalinter-reports/
+node_modules/
 npm-debug.log*
 report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
 yarn-debug.log*
-yarn-error.log
 yarn-error.log*
-/.idea/
-.idea/*
-/.vscode/
+.idea/
+.vscode/
 .fleet/
 CLAUDE.md