Added classes with class properties, class methods and constructors

[ByteWolf-dev]

What type of change does this PR perform?

• [ ] Info or documentation change (Non-breaking change that updates repo info files (e.g. README.md, CONTRIBUTING.md, etc.) or online documentation)
• [ ] Website (Change that changes the design or functionality of the websites or docs)
• [ ] Development or internal changes (These changes do not add new features or fix bugs, but update the code in other ways)
• [ ] Bug fix (Non-breaking change which fixes an issue)
• [x] New feature (Non-breaking change which adds functionality)
• [ ] Breaking change (Major bug fix or feature that would cause existing functionality not to work as expected.)
• [ ] Requires a documentation update, as it changes language or compiler behaviour

Summary

The AST structure, code analysis and code generation were done for Kipper classes.

Closes #665

Detailed Changelog

Not present for website/docs changes

Added

• Added semantic checking and code generation for classes, class methods, class properties and class constructors. (#665)
• New classes:
  • ClassMethodDeclaration, which represents an AST class method declaration.
  • ClassPropertyDeclaration, which represents an AST class property declaration.
  • ClassConstructorDeclaration, which represents an AST class constructor.
  • ClassMethodDeclarationSemantics, which represents the semantics of a class method declaration.
  • ClassMethodDeclarationTypeSemantics, which represents the type semantics of a class method declaration.
  • ClassPropertyDeclarationSemantics, which represents the semantics of a class property declaration.
  • ClassPropertyDeclarationTypeSemantics, which represents the type semantics of a class property declaration.
  • ClassConstructorDeclarationSemantics, which represents the semantics of a class constructor declaration.
  • ClassConstructorDeclarationTypeSemantics, which represents the type semantics of a class constructor declaration.

Does this PR create new warnings?

None.

Linked issues or PRs

• [x] #665

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 77.24868% with 43 lines in your changes missing coverage. Please review.

Project coverage is 83.92%. Comparing base (e66fd3c) to head (3036e90).

Files	Patch %	Lines
kipper/target-js/src/code-generator.ts	61.76%	13 Missing :warning:
...ass-method-declaration/class-method-declaration.ts	79.48%	6 Missing and 2 partials :warning:
...uctor-declaration/class-constructor-declaration.ts	80.00%	7 Missing :warning:
kipper/target-ts/src/code-generator.ts	61.11%	7 Missing :warning:
...property-declaration/class-property-declaration.ts	77.77%	5 Missing and 1 partial :warning:
...declaration/class-declaration/class-declaration.ts	77.77%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev-next #675 +/- ## ============================================ - Coverage 83.94% 83.92% -0.02% ============================================ Files 262 270 +8 Lines 4316 4499 +183 Branches 470 478 +8 ============================================ + Hits 3623 3776 +153 - Misses 555 582 +27 - Partials 138 141 +3 ```

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