* chore(docs): remove token economy guide
* refactor(context): update GatewayContext to use Querier interface
* chore(database): update schema path
* docs: Update READMEs for x/did, x/dwn, and x/svc with UCAN integration
* chore(pkg): update database scope name
* refactor(did): optimize GenesisState proto methods
* refactor(svc): update Service proto to use repeated fields
* refactor(api): rename MsgSpawn to MsgInitialize