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/21.intercept_spec.sh

@@ -0,0 +1,36 @@
+#shellcheck shell=sh
+
+Describe 'intercept example'
+  Intercept begin
+  __begin__() {
+    # Define stubs for cat
+    cat() {
+      if [ "${1:-}" = "/proc/cpuinfo" ];then
+        %text
+        #|processor       : 0
+        #|vendor_id       : GenuineIntel
+        #|cpu family      : 6
+        #|model           : 58
+        #|model name      :         Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
+        #|
+        #|processor       : 1
+        #|vendor_id       : GenuineIntel
+        #|cpu family      : 6
+        #|model           : 58
+        #|model name      :         Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
+        #|
+        #|processor       : 2
+        #|vendor_id       : GenuineIntel
+        #|cpu family      : 6
+        #|model           : 58
+        #|model name      :         Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
+      else
+        command cat "$@"
+      fi
+    }
+  }
+  Example 'test cpunum.sh with stubbed cat /cpu/info'
+    When run source ./count_cpus.sh
+    The stdout should eq 3
+  End
+End