OpenSpec/Dir/Inability to customize openspec dir location

• As of 2026-06-04 Thu it's not currently possible to put specs anywhere but <PROJECT_ROOT>/openspec/.
  • Feature Request - Allow configurable OpenSpec directory name · Issue #581 · Fission-AI/OpenSpec
  • Proposal: Configurable specs path (specsPath in config.yaml) · Issue #664 · Fission-AI/OpenSpec