Streamline README badges and reduce header noise

[lock14]

Description

This pull request streamlines the badges at the top of README.md to reduce visual noise and improve presentation:

• Removed redundant static badges:
  • Removed Platform (Linux | macOS | Windows), which is already detailed in the intro and installation sections.
  • Removed Engines (DSDA-Doom | UZDoom), which is stated directly in the first sentence.
  • Removed Presets (32 megawads), which duplicated the dynamic presets table count.
• Unified status badges:
  • Aligned CI and Security workflow badge URLs with the shields.io pattern used across lock14/collections.
  • Retained the 4 core indicators: Go Version, CI status, Security status, and License.

Type of Change

• 📝 Documentation update (README.md)

Verification & Testing

• Ran make check (all tests, formatting, linters, and preset parity verified).
• Inspected diff for personal path invariants (clean).