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/16.text_directive_spec.sh

@@ -0,0 +1,93 @@
+#shellcheck shell=sh disable=SC2016
+
+# %text directive is easy way to output text like here document.
+# Removes `#|` from the beginning of the each line in the %text directive,
+# the rest is the output text.
+
+Describe '%text directive'
+  It 'outputs texts'
+    output() {
+      echo "start" # you can write code here
+      %text
+      #|aaa
+      #|bbb
+      #|ccc
+      echo "end" # you can write code here
+    }
+    When call output
+    The line 1 of output should eq 'start'
+    The line 2 of output should eq 'aaa'
+    The line 3 of output should eq 'bbb'
+    The line 4 of output should eq "ccc"
+    The line 5 of output should eq 'end'
+  End
+
+  It 'sets to variable'
+    output() {
+      texts=$(
+        %text
+        #|aaa
+        #|bbb
+        #|ccc
+      )
+      echo "$texts"
+    }
+    When call output
+    The line 1 of output should eq 'aaa'
+    The line 2 of output should eq 'bbb'
+    The line 3 of output should eq "ccc"
+  End
+
+  It 'outputs texts with filter'
+    output() {
+      %text | tr 'a-z_' 'A-Z_'
+      #|abc
+    }
+    When call output
+    The output should eq 'ABC'
+  End
+
+  Describe 'variable expantion'
+    Before 'text=abc'
+
+    Example 'not expand variable (default)'
+      output() {
+        %text:raw
+        #|$text
+      }
+      When call output
+      The output should eq '$text'
+    End
+
+    Example 'expand variable'
+      output() {
+        %text:expand
+        #|$text
+      }
+      When call output
+      The output should eq 'abc'
+    End
+  End
+
+  It 'outputs texts with more complex code'
+    output() {
+      if true; then
+        set -- 1 2 3 4 5
+        while [ $# -gt 0 ]; do
+          %text:expand | tr 'a-z_' 'A-Z_'
+          #|value $(($1 * 10))
+          shift
+        done
+      else
+        %text
+        #|text
+      fi
+    }
+    When call output
+    The line 1 of output should eq 'VALUE 10'
+    The line 2 of output should eq 'VALUE 20'
+    The line 3 of output should eq 'VALUE 30'
+    The line 4 of output should eq "VALUE 40"
+    The line 5 of output should eq 'VALUE 50'
+  End
+End