Community creation via environment variable

[Matobi98]

Re-enable community creation via environment variable

Background

The /community command that triggers the community creation wizard
(COMMUNITY_WIZARD_SCENE_ID) is currently commented out in
bot/modules/community/index.ts. The wizard itself is fully implemented in
scenes.ts, but there is no way for users to invoke it.

Proposed solution

Introduce a COMMUNITY_CREATION_ENABLED environment variable (default: false)
that controls whether the /community command is registered at bot startup.

Behavior:

• COMMUNITY_CREATION_ENABLED=false (default) — /community is not registered;
  community creation is disabled
• COMMUNITY_CREATION_ENABLED=true — /community is registered and users can
  create communities through the existing wizard flow

Implementation

1. Add COMMUNITY_CREATION_ENABLED=false to .env-sample with a comment explaining it
2. In bot/modules/community/index.ts, replace the commented-out block with a
   conditional registration:

if (process.env.COMMUNITY_CREATION_ENABLED === 'true') {
  bot.command('community', userMiddleware, async ctx => {
    await ctx.scene.enter('COMMUNITY_WIZARD_SCENE_ID', { bot, user: ctx.user });
  });
}

3. No changes needed to the wizard scene itself — it is already complete

Why default to false?

Community creation should be opt-in at the instance level. Bot operators may
want to run a closed instance where only pre-existing communities are allowed,
without exposing the creation flow to all users.