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

.coderabbit.yaml

@@ -2,13 +2,16 @@
 # yaml-language-server: $schema=https://www.coderabbit.ai/integrations/schema.v2.json
 remote_config:
   url: "https://raw.githubusercontent.com/ivuorinen/coderabbit/main/coderabbit.yaml"
+path_filters:
+  - "!src/**"
+  - "!test/spec/**"
+  - "!test/corpus/**"
 path_instructions:
   - path: ".serena/**/*"
-    instructions: >-
-      - These are files for Serena LLM. Do not review them.
+    instructions: "These are files for Serena LLM. Do not review them."
   - path: "src/**/*"
-    instructions: >-
-      - These are automatically generated files. Do not review them.
+    instructions: "These are automatically generated files. Do not review them."
   - path: "test/spec/**/*"
-    instructions: >-
-      - These are test files for the grammar. Do not review them.
+    instructions: "These are test files for the grammar. Do not review them."
+  - path: "test/corpus/**/*"
+    instructions: "Grammar corpora. Do not review them."