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/22.sourcced_spec.sh

@@ -0,0 +1,35 @@
+#shellcheck shell=sh
+
+# Sometime, functions are defined in a single shell script.
+# You will want to test it. but you do not want to run the script.
+# You want to test only the function, right?
+Describe 'sourced return example'
+  Include ./count_lines.sh
+
+  Example 'test cpunum.sh with stubbed cat /cpu/info'
+    Data
+      #|1
+      #|2
+      #|3
+      #|4
+      #|5
+    End
+
+    When call count_lines
+    The stdout should eq 5
+  End
+
+  Example 'test cpunum.sh with stubbed cat /cpu/info'
+    Data data
+    data() {
+      %putsn "line1"
+      %putsn "line2"
+      %putsn "line3"
+      %putsn "line4"
+      %puts "line5 (without newline)"
+    }
+
+    When call count_lines
+    The stdout should eq 5
+  End
+End