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

.github/actions/test-coverage/action.yml

@@ -0,0 +1,71 @@
+---
+name: "Test Coverage Analysis"
+description: "Analyzes test coverage and generates coverage report"
+
+inputs:
+  minimum-tests:
+    description: "Minimum number of tests required"
+    required: false
+    default: "55"
+
+outputs:
+  total-tests:
+    description: "Total number of tests found"
+    value: ${{ steps.coverage.outputs.total-tests }}
+  passing-tests:
+    description: "Number of passing tests"
+    value: ${{ steps.coverage.outputs.passing-tests }}
+  coverage-percent:
+    description: "Test coverage percentage"
+    value: ${{ steps.coverage.outputs.coverage-percent }}
+
+runs:
+  using: "composite"
+  steps:
+    - name: Test Coverage Analysis
+      id: coverage
+      run: |
+        echo "## Test Coverage Report" > coverage_report.md
+        echo "" >> coverage_report.md
+
+        # Run tests and capture output
+        TEST_OUTPUT=$(npm test 2>&1)
+        TOTAL_TESTS=$(echo "$TEST_OUTPUT" | grep -E "^\s+[0-9]+\." | wc -l)
+        PASSING_TESTS=$(echo "$TEST_OUTPUT" | grep -E "^\s+[0-9]+\. ✓" | wc -l)
+        FAILING_TESTS=$(echo "$TEST_OUTPUT" | grep -E "^\s+[0-9]+\. ✗" | wc -l)
+
+        echo "- **Total Tests:** $TOTAL_TESTS" >> coverage_report.md
+        echo "- **Passing:** $PASSING_TESTS ✅" >> coverage_report.md
+        echo "- **Failing:** $FAILING_TESTS ❌" >> coverage_report.md
+
+        if [ $TOTAL_TESTS -gt 0 ]; then
+          COVERAGE_PERCENT=$(( (PASSING_TESTS * 100) / TOTAL_TESTS ))
+          echo "- **Coverage:** $COVERAGE_PERCENT%" >> coverage_report.md
+        else
+          COVERAGE_PERCENT=0
+        fi
+
+        echo "" >> coverage_report.md
+        echo "### Test Files" >> coverage_report.md
+        echo "$TEST_OUTPUT" | grep -E "^\s+[a-z_]+:" | sed 's/^/- /' >> coverage_report.md
+
+        cat coverage_report.md
+
+        # Set outputs
+        echo "total-tests=$TOTAL_TESTS" >> $GITHUB_OUTPUT
+        echo "passing-tests=$PASSING_TESTS" >> $GITHUB_OUTPUT
+        echo "coverage-percent=$COVERAGE_PERCENT" >> $GITHUB_OUTPUT
+
+        # Validate test coverage requirements
+        if [ $TOTAL_TESTS -lt ${{ inputs.minimum-tests }} ]; then
+          echo "❌ Expected at least ${{ inputs.minimum-tests }} tests, found $TOTAL_TESTS"
+          exit 1
+        fi
+
+        if [ $FAILING_TESTS -gt 0 ]; then
+          echo "❌ Found $FAILING_TESTS failing tests"
+          exit 1
+        fi
+
+        echo "✅ Test coverage is acceptable: $PASSING_TESTS/$TOTAL_TESTS tests passing ($COVERAGE_PERCENT%)"
+      shell: bash