v0.2 - Cross-language product documentation foundation

Establish the public documentation baseline for the v0.2 exact-target server and first-party clients, define the complete SA 2026.1.0529.7 MP catalog documentation model, build catalog navigation, and publish all retained command identities with honest initial statuses. spatialanalyzer/briosa remains authoritative for protocol, runtime support, and reviewed dispositions; documentation data cannot create supported behavior.