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/13.pending_spec.sh

@@ -0,0 +1,22 @@
+#shellcheck shell=sh
+
+# Pending is better than skip in some case. Skip is just only skips,
+# but Pending is runs example and decide the success or failure.
+# The pend example success if the expectations fails as expected.
+# The pend example fails if the expectation succeeds unexpectedly.
+
+Describe 'pending example'
+  Example 'this example not fails (because it is not yet implemented as expected)'
+    Pending 'not yet implemented'
+    echo_ok() { :; } # not yet implemented
+    When call echo_ok
+    The output should eq "ok"
+  End
+
+  Example 'this example fails (because it is implemented as unexpected)'
+    Pending 'not yet implemented'
+    echo_ok() { echo ok; } # implemented
+    When call echo_ok
+    The output should eq "ok"
+  End
+End