Added agents.md file

[Filter94]

Note

Adds AGENTS.md outlining code style guidelines, dev environment tips, and general contributor checks.

• Documentation:
  • Add AGENTS.md describing:
    • Code style/quality guidelines (Kotlin idioms, SOLID, ktlint).
    • Dev environment tips (build with Gradle/Make, formatting commands, viewing Gradle test reports).
    • Pre-submit checks (project compiles, code formatted).

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