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/11.matcher_spec.sh

@@ -0,0 +1,118 @@
+#shellcheck shell=sh
+
+Describe 'matcher example'
+  Describe 'status matchers'
+    Describe 'be success matcher'
+      It 'checks if status is successful'
+        When call true
+        The status should be success # status is 0
+      End
+    End
+
+    Describe 'be failure matcher'
+      It 'checks if status is failed'
+        When call false
+        The status should be failure # status is 1-255
+      End
+    End
+
+    # If you want to check status number, use equal matcher.
+  End
+
+  Describe 'stat matchers'
+    Describe 'exists'
+      It 'checks if path exists'
+        The path 'data.txt' should exist
+      End
+
+      It 'checks if path is file'
+        The path 'data.txt' should be file
+      End
+
+      It 'checks if path is directory'
+        The path 'data.txt' should be directory
+      End
+    End
+
+    # There are many other stat matchers.
+    #   be empty, be symlink, be pipe, be socket, be readable, be writable,
+    #   be executable, be block_device, be character_device,
+    #   has setgid, has setuid
+  End
+
+  Describe 'variable matchers'
+    Before 'prepare'
+
+    Describe 'be defined'
+      prepare() { var=''; }
+      It 'checks if variable is defined'
+        The value "$var" should be defined
+      End
+    End
+
+    Describe 'be undefined'
+      prepare() { unset var; }
+      It 'checks if variable is undefined'
+        The variable var should be undefined
+      End
+    End
+
+    Describe 'be present'
+      prepare() { var=123; }
+      It 'checks if variable is present'
+        The value "$var" should be present # non-zero length string
+      End
+    End
+
+    Describe 'be blank'
+      prepare() { var=""; }
+      It 'checks if variable is blank'
+        The value "$var" should be blank # unset or zero length string
+      End
+    End
+  End
+
+  Describe 'string matchers'
+    Describe 'equal'
+      It 'checks if subject equals specified string'
+        The value "foobarbaz" should equal "foobarbaz"
+      End
+    End
+
+    Describe 'start with'
+      It 'checks if subject start with specified string'
+        The value "foobarbaz" should start with "foo"
+      End
+    End
+
+    Describe 'end with'
+      It 'checks if subject end with specified string'
+        The value "foobarbaz" should end with "baz"
+      End
+    End
+
+    Describe 'include'
+      It 'checks if subject include specified string'
+        The value "foobarbaz" should include "bar"
+      End
+    End
+
+    Describe 'match'
+      It 'checks if subject match specified pattern'
+        # Using shell script's pattern matching
+        The value "foobarbaz" should match pattern "f??bar*"
+      End
+    End
+  End
+
+  Describe 'satisfy matcher'
+    formula() {
+      eval "value=${formula:?}"
+      [ $(($1)) -eq 1 ]
+    }
+
+    It 'checks if satisfy condition'
+      The value 10 should satisfy formula "value >= 5"
+    End
+  End
+End