Ean Schuessler / mo-mcp

Add wiki docs for Party and Product screens

Added MCP screen documentation for:
- FindParty: Quick actions for creating people, orgs, accounts, employees
- EditParty: Party detail management, roles, classifications, user accounts
- PartyMessages/FindMessage: Internal messaging between parties
- FindProduct: Product search and creation, variant workflow overview
- EditProduct: Features, associations, complete variant setup guide

Each doc includes example action calls with parameters.