feat(commands): unify chat commands (#275)

* Chat commands: registry, access groups, Carbon

* Chat commands: clear native commands on disable

* fix(commands): align command surface typing

* docs(changelog): note commands registry (PR #275)

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Co-authored-by: Peter Steinberger <steipete@gmail.com>

src/gateway/server-providers.ts

@@ -473,7 +473,6 @@ export function createProviderManager(
       token: discordToken.trim(),
       runtime: discordRuntimeEnv,
       abortSignal: discordAbort.signal,
-      slashCommand: cfg.discord?.slashCommand,
       mediaMaxMb: cfg.discord?.mediaMaxMb,
       historyLimit: cfg.discord?.historyLimit,
     })