Add unified partner discovery endpoint for project creation - Implemented /api/v1/organizations/partners for easy contractor/client discovery - Returns ALL contractors to client admins, ALL clients to contractor admins - Includes project stats (active/total counts) for informed partner selection - Open marketplace model: no invitations needed, instant project creation - Supports search, filtering by industry/active status, pagination - Added comprehensive PROJECT_CREATION_FLOW.md documentation

chore: migrate to useast organize the docs, delete redundant migrations