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

.serena/memories/code_style_conventions.md

@@ -0,0 +1,41 @@
+# Code Style and Conventions
+
+## EditorConfig Rules
+
+All files follow `.editorconfig` specifications:
+
+- **Charset**: UTF-8
+- **Line endings**: LF (Unix style)
+- **Indentation**: 2 spaces (no tabs except Makefiles)
+- **Max line length**: 160 characters
+- **Final newline**: Required
+- **Trim trailing whitespace**: Yes (except .md files)
+
+## JavaScript/Grammar Conventions
+
+- Use 2-space indentation
+- JSDoc comments for file headers
+- TypeScript reference comments for tree-sitter DSL
+- Semicolons and consistent formatting
+- Descriptive field names in grammar rules
+
+## Grammar Design Patterns
+
+- Use `prec.right(1, seq(...))` for block structures
+- Handle conflicts explicitly in the `conflicts` array
+- Extend original bash rules with `choice(original, new_rules)`
+- Use `field()` for semantic labeling of important parts
+- Block patterns: `BlockType description statements End`
+
+## File Organization
+
+- `grammar.js`: Main grammar definition
+- `src/`: Generated parser files (don't edit manually)
+- Configuration files in root directory
+- GitHub workflows in `.github/workflows/`
+
+## Naming Conventions
+
+- Snake_case for grammar rule names
+- Descriptive names for block types and fields
+- Prefix ShellSpec-specific rules with `shellspec_`