docs: remap docs-manifest.json from edgestack-v2 to current repos

Replace deprecated edgestack_v2 sources with their new home repos:
- stackbilt-web: platform.md, ecosystem.md, api-reference.md
- stackbilt-mcp-gateway: mcp.md
- charter: compass-governance-api.md (moved from edgestack)
- aegis-oss: architecture.md (new aegis block)

Also removes CLAUDE.md.pre-adf-migrate.bak and fixes trailing comma
in charter block that made the JSON technically invalid.

Closes #11

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Kurt Overmier