Implements built-in codeLens of typescript-language-features #34
Description
References:
- https://github.com/microsoft/vscode/blob/main/extensions/typescript-language-features/src/languageFeatures/codeLens/baseCodeLensProvider.ts
- https://github.com/microsoft/vscode/blob/main/extensions/typescript-language-features/src/languageFeatures/codeLens/implementationsCodeLens.ts
- https://github.com/microsoft/vscode/blob/main/extensions/typescript-language-features/src/languageFeatures/codeLens/referencesCodeLens.ts