feat: implement complete tree-sitter-shellspec grammar with comprehensive testing

- Add full ShellSpec grammar extending tree-sitter-bash
- Support all ShellSpec constructs: Describe, Context, It, hooks, utilities
- Include Data block parsing with statements and argument styles
- Add 61 comprehensive test cases covering real-world patterns
- Implement optimized GitHub workflows with CI/CD automation
- Configure complete development tooling (linting, formatting, pre-commit)
- Add comprehensive documentation and contribution guidelines
- Optimize grammar conflicts to zero warnings
- Support editor integration for Neovim, VS Code, Emacs

Breaking Changes:
- Initial release, no previous API to break

BREAKING CHANGE: Initial implementation of tree-sitter-shellspec grammar

# Conflicts:
#	.github/workflows/codeql.yml
#	.github/workflows/pr-lint.yml
#	.pre-commit-config.yaml

# Conflicts:
#	.github/workflows/pr-lint.yml

# Conflicts:
#	.github/workflows/pr-lint.yml

tree-sitter.json

@@ -0,0 +1,41 @@
+{
+  "grammars": [
+    {
+      "name": "shellspec",
+      "camelcase": "Shellspec",
+      "scope": "source.shellspec",
+      "path": ".",
+      "file-types": [
+        "shellspec"
+      ],
+      "highlights": [
+        "queries/highlights.scm"
+      ],
+      "locals": [
+        "queries/locals.scm"
+      ],
+      "injection-regex": "shellspec"
+    }
+  ],
+  "metadata": {
+    "version": "0.1.0",
+    "license": "MIT",
+    "description": "ShellSpec grammar for tree-sitter (extends bash)",
+    "authors": [
+      {
+        "name": "Ismo Vuorinen"
+      }
+    ],
+    "links": {
+      "repository": "https://github.com/ivuorinen/tree-sitter-shellspec"
+    }
+  },
+  "bindings": {
+    "c": true,
+    "go": true,
+    "node": true,
+    "python": true,
+    "rust": true,
+    "swift": true
+  }
+}