Add CLAUDE.md for ast-jetbrains-plugin (AST-146801)

[cx-atish-jadhav]

Description

Added standardized CLAUDE.md file for the ast-jetbrains-plugin repository as part of the Claude MD standardization initiative.

CLAUDE.md is a context file that provides Claude AI with instant knowledge
about the project, enabling faster and more accurate assistance for all
team members. It covers:

• Project overview and split plugin architecture (Checkmarx AST + DevAssist)
• Module dependency graph (common-lib → devassist-lib → plugin modules)
• Repository structure and key packages
• Technology stack (Java 11, Gradle 8.x, IntelliJ Platform 2022.2.1)
• Build commands, development setup, and test execution
• Coding standards and project rules
• CI/CD workflows and release process
• Telemetry events and values
• Debugging steps
• Security and access details

References

• Epic: AST-146801
• Ticket: AST-146801

Testing

• No code changes — documentation only (CLAUDE.md file addition)
• No unit/integration tests required
• Verified that the CLAUDE.md content accurately reflects the current project structure, build system, and workflows by cross-referencing with gradle.properties, settings.gradle, build.gradle, plugin.xml files, and CI/CD workflow files

Checklist

• I have added documentation for new/changed functionality in this PR (if applicable).
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used

[github-actions]

Checkmarx One – Scan Summary & Details – 330e5242-ebb6-4047-a5be-0b7623887418

Great job! No new security vulnerabilities introduced in this pull request