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/04.evaluation_spec.sh

@@ -0,0 +1,75 @@
+#shellcheck shell=sh disable=SC2016
+
+Describe 'evaluation example'
+  Describe 'call evaluation'
+    It 'calls function'
+      foo() { echo "foo"; }
+      When call foo # this is evaluation
+      The output should eq "foo"
+    End
+
+    It 'calls external command also'
+      When call expr 1 + 2
+      The output should eq 3
+    End
+
+    It 'calls the defined function instead of external command that same name'
+      expr() { echo "be called"; }
+      When call expr 1 + 2
+      The output should eq "be called"
+    End
+
+    It 'must be one call each example'
+      When call echo 1
+      When call echo 2 # can not be called more than once.
+      The output should eq 1
+    End
+
+    It 'not calling is allowed'
+      The value 123 should eq 123
+    End
+
+    It 'can not be called after expectation'
+      The value 123 should eq 123
+      When call echo 1 # can not be called after expectation.
+    End
+
+    It 'calls external command'
+      expr() { echo "not called"; }
+      When run command expr 1 + 2
+      The output should eq 3
+    End
+  End
+
+  Describe 'run evaluation'
+    It 'can trap exit'
+      abort() { exit 1; }
+      When run abort # if use "call evaluation", shellspec is terminate
+      The status should be failure
+    End
+
+    It 'can not modify variable because it run with in subshell'
+      set_value() { SHELLSPEC_VERSION=$1; }
+      When run set_value 'no-version'
+      The value "$SHELLSPEC_VERSION" should not eq 'no-version'
+    End
+
+    It 'calls BeforeRun/AfterRun hook'
+      before_run() {
+        # You can temporary redefine function here
+        # redefined function is restored after run evaluation
+        # because run evaluation runs with in subshell
+        echo before
+      }
+      after_run() {
+        echo after
+      }
+      BeforeRun before_run
+      AfterRun after_run
+      When run echo 123
+      The line 1 of output should eq 'before'
+      The line 2 of output should eq 123
+      The line 3 of output should eq 'after'
+    End
+  End
+End