new feature: break continue - #17

… principles, and workflows

…rds, covering requirements, user scenarios, and validation criteria

…steps and feature guidance

…`continue` keywords in PHP Script, including AST nodes, lexer/parser integration, loop context tracking, and validation rules

…rds in PHP Script, including AST nodes, lexer/parser updates, loop context handling, testing, and validation criteria

…aversal, and codegen

- Added `BreakStatement` node to the AST.
- Updated lexer to recognize `break` and `continue` keywords.
- Extended parser to handle `break` expressions with and without levels.
- Enhanced `AstTraverser` to validate loop depth and process break levels.
- Added comprehensive unit tests for parsing, traversal, validation, and rendering of `break` statements.

… traversal, and codegen

- Added `ContinueStatement` node to the AST.
- Extended parser to handle `continue` statements with and without levels.
- Enhanced `AstTraverser` for validating loop depth and processing `continue` levels.
- Implemented code generation for `continue` statements in `PhpScriptRenderer`.
- Added comprehensive unit tests for parsing, traversal, validation, and rendering of `continue` statements.
- Updated `MonarchLanguageDefinitionService` to include snippets for `continue` and `continue N`.

…ST and traversal

- Added tests for `break` and `continue` execution in loops.
- Included additional tests for visitor pattern methods (`visitBreakStatement` and `visitContinueStatement`).
- Achieved 100% coverage for `break` and `continue` statements in `AstTraverser`.
- Introduced `TestAstTraverser` helper class for loop depth simulation in tests.
- Updated tests to ensure validation of loop context handling for `break` and `continue`.

…xamples and usage

- Added detailed sections on `break` and `continue` statements, including syntax, examples, and nested loop handling.
- Clarified runtime error scenarios for improper use of `break` and `continue`.
- Expanded documentation with code samples for level-based loop control.

- Updated the editor to dynamically provide `break` and `continue` suggestions only when inside loops.
- Separated `loopControls` category for loop-specific snippets from `controlFlows`.
- Adjusted `MonarchLanguageDefinitionService` to exclude `break` and `continue` from global keywords, adding them to `loopKeywords`.
- Added depth tracking logic to identify valid loop contexts for IntelliSense.
- Updated tests to confirm correct categorization and suggestion behavior for loop controls.