Allow dupes as a server options

[ker0olos]

New

• added /server options only available to users with the Manage Server permission.

• added a new Dupes server option allows multiple users on your server to own the same characters. as of now, the same user can't pull dupes of the same character again, this only allow multiple different users to own the same characters, disabling exclusive ownership.

Other

• updated the steal image (new image created by @nyenvt)
• updated the combat mode maintenance message to reflect that's it's not just under a normal maintenance, but is turned off until the PVE v3 update.

closes #387

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 84.98789% with 62 lines in your changes missing coverage. Please review.

Project coverage is 80.06%. Comparing base (cf4a493) to head (30a8e29).

Files	Patch %	Lines
src/serverOptions.ts	73.33%	20 Missing :warning:
src/stats.ts	51.72%	14 Missing :warning:
src/interactions.ts	80.00%	9 Missing :warning:
src/chat.ts	62.50%	6 Missing :warning:
src/user.ts	55.55%	4 Missing :warning:
db/manageGuild.ts	86.36%	3 Missing :warning:
src/search.ts	91.42%	3 Missing :warning:
src/gacha.ts	83.33%	1 Missing :warning:
src/steal.ts	98.52%	1 Missing :warning:
src/trade.ts	80.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #404 +/- ## ========================================== - Coverage 80.08% 80.06% -0.03% ========================================== Files 44 46 +2 Lines 12517 12730 +213 Branches 1421 1445 +24 ========================================== + Hits 10024 10192 +168 - Misses 2467 2513 +46 + Partials 26 25 -1 ```

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