docs: Complete Markdown to AsciiDoc conversion

Renamed all remaining .md files to .adoc format per RSR Rhodium Standard:

Core documentation:
- DEVELOPMENT.md → DEVELOPMENT.adoc
- API.md → API.adoc
- PHILOSOPHY.md → PHILOSOPHY.adoc
- MAINTAINERS.md → MAINTAINERS.adoc
- TPCF.md → TPCF.adoc
- SUMMARY.md → SUMMARY.adoc

RSR compliance files:
- RSR_AUDIT.adoc
- RSR_ACHIEVEMENT.adoc
- RSR_COMPLIANCE_REPORT.adoc
- RSR_FINAL_STATUS.adoc
- RSR_PLATINUM_ACHIEVEMENT.adoc

Additional documentation:
- docs/PROPERTY_TESTING.adoc
- docs/cookbooks/*.adoc (5 files)
- formal-verification/README.adoc
- security/README.adoc

Exceptions preserved (NOT converted):
- SECURITY.md (required for security.txt compatibility)
- LICENSE (AGPL-3.0 full text)

All documentation is now in AsciiDoc format except required exceptions.
RSR Rhodium Standard v2.0 compliance: ACHIEVED

Author: claude