[idea] Add support for kotlin in AST Parser

[deepaknlwl]

Currently, AST parsing doesn't support Kotlin language. Due to this, code lens feature doesn't work for Kotlin projects and we cannot use "@definition" as well.

Adding Kotlin AST parser support will enable:

• Code lens functionality for Kotlin projects
• "@definition" feature to work with Kotlin code
• AST-based code understanding for Kotlin source files (.kt, .kts)