rename: opencortex → passepartout across memex

- .gitmodules: update submodule paths (projects/opencortex → projects/passepartout,
  projects/opencortex-contrib → projects/passepartout-contrib)
- gtd.org, README.org: update project references and display names
- check.lisp, gemini-vision.org, agora/TODO.org: update file paths
- dotemacs: update agenda paths and template config
- system/plans/: update all flight plan references
- system/backups/: update monolithic backup references

system/plans/flight-plan-neuro-microkernel.org

@@ -11,14 +11,14 @@ Decouple HTTP request logic from the core neuro kernel (`neuro.lisp`) and migrat
 - Solution: Move HTTP logic to `org-skill-provider-*` modules. The kernel's `ask-neuro` becomes a pure interface.
 
 * Phase C: Success (Quality - Analyst Phase)
-- **TDD Requirement:** Create `projects/opencortex/tests/neuro-test.lisp` containing assertions for the new `ask-neuro` contract.
+- **TDD Requirement:** Create `projects/passepartout/tests/neuro-test.lisp` containing assertions for the new `ask-neuro` contract.
 - The tests MUST be executed and PROVE failure before any code is modified.
 - Tests will assert that:
   1. `ask-neuro` fails gracefully when the `*neuro-backends*` registry is empty.
   2. `ask-neuro` succeeds when a mock provider is registered and correctly delegates the prompt to the mock function.
 
 * Phase D: Build (Engineering - Coder Phase)
-- Strip `execute-openrouter-request`, `execute-groq-request`, and `execute-gemini-request` from `projects/opencortex/docs/README.org`.
+- Strip `execute-openrouter-request`, `execute-groq-request`, and `execute-gemini-request` from `projects/passepartout/docs/README.org`.
 - Draft `notes/org-skill-provider-openrouter.org`.
 - Draft `notes/org-skill-provider-groq.org`.
 - Draft `notes/org-skill-provider-gemini.org`.