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/03.example_spec.sh

@@ -0,0 +1,37 @@
+#shellcheck shell=sh
+
+Describe 'example example'
+  It 'is "example"'
+    When call echo 'foo'
+    The output should eq 'foo'
+  End
+
+  Example 'is "example"'
+    When call echo 'bar'
+    The output should eq 'bar'
+  End
+
+  Specify 'is also "example"'
+    When call echo 'baz'
+    The output should eq 'baz'
+  End
+
+  Example 'this is "Not yot implemented" example block'
+    :
+  End
+
+  Todo 'what to do' # same as "Not yot implemented" example but not block
+
+  It 'not allows define "example group" in "example"'
+    # Describe 'example group'
+    #   this is syntax error
+    # End
+    The value 1 should eq 1
+  End
+End
+
+# example group is not required
+It 'is "example" without "example group"'
+  When call echo 'foo'
+  The output should eq 'foo'
+End