Reorganize brain: projects/ top level, rename filenames, update homepage

- Moved everything from ideas/passepartout/ to projects/passepartout/
- Moved legal structures to projects/flags/
- Created missing _index.org files for all subdirectories
- Stripped redundant passepartout- prefix from filenames
- Rewrote root _index.org as generalized brain index (projects + concepts)
- Updated Hugo nav to Projects/Concepts
- Updated build script section descriptions
- Deleted stale ideas/passepartout-economics.md orphan

projects/passepartout/strategy/compliance/ifc-ps.org

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+:PROPERTIES:
+:ID:       68c55deb-72bf-4b15-ac28-bcc792057543
+:ID:       auto-ifc-ps
+:CREATED:  [2026-05-23 Sat]
+:END:
+#+title: IFC Performance Standards
+#+filetags: :passepartout:compliance:framework:ifc:
+
+projects in 100+ countries. Also adopted by many multilateral development banks
+(MDBs) as their standard.
+
+Why it matters: ESF compliance is condition precedent to World Bank disbursement.
+Delays in compliance verification delay project funding. The gate stack's
+deterministic rule system can encode ESF standards as execution gates — "no
+disbursement unless ESS5 resettlement plan is verified complete." First-mover
+advantage: World Bank compliance is entirely document-based (reports, audits,
+site visits). A verified gate system is unprecedented.
+
+** [[id:fc736aec-ef53-4759-9787-62bc8deea2e7][IFC Performance Standards]] (PS)
+
+International Finance Corporation's standards for environmental and social
+sustainability in private sector investment. Eight standards: PS1 (risk
+management), PS2 (labor), PS3 (resource efficiency), PS4 (community health),
+PS5 (land/resettlement), PS6 (biodiversity), PS7 (indigenous peoples), PS8
+(cultural heritage). Adopted by over 80 Equator Principles financial
+institutions (project finance lenders).
+