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

test/spec/02.example_group_spec.sh

@@ -0,0 +1,24 @@
+#shellcheck shell=sh
+
+Describe 'this is "example group"'
+  Context 'this is also "example group"'
+    # You can write an "example" here
+  End
+
+  Describe '"example group" can be nestable'
+    # You can write an "example" here
+  End
+
+  Context 'this is also "example group"'
+    # You can write an "example" here
+
+    Describe '"example group" can be nestable'
+      # You can write an "example" here
+    End
+
+    # You can write an "example" here
+  End
+  # You can write an "example" here
+End
+
+# You can write an "example" here