Index Builtins Suggestions

[4e6]

Pull Request Description

close #1548

PR enables suggestions indexing for the Builtins module.

Changelog:

• feat: index Builtins
• feat: add runtime flags that enable suggestions indexing of the project files and external libraries
• refactor: tests for suggestion updates into a separate test-suite

Important Notes

Checklist

Please include the following checklist in your PR:

• The documentation has been updated if necessary.
• All code conforms to the Scala, Java, and Rust style guides.
• All documentation and configuration conforms to the markdown and YAML style guides.
• All code has been tested where possible.