Extend <> message card search to Rush Duel

[kevinlul]

Closes #341

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 17.54386% with 94 lines in your changes are missing coverage. Please review.

Project coverage is 46.56%. Comparing base (8b6f978) to head (b0aa579).

Files	Patch %	Lines
src/events/message-search.ts	17.11%	92 Missing :warning:
src/metrics.ts	33.33%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #463 +/- ## ========================================== - Coverage 46.81% 46.56% -0.25% ========================================== Files 34 34 Lines 4627 4692 +65 Branches 140 141 +1 ========================================== + Hits 2166 2185 +19 - Misses 2461 2507 +46 ``` | [Flag](https://app.codecov.io/gh/DawnbrandBots/bastion-bot/pull/463/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DawnbrandBots) | Coverage Δ | | |---|---|---| | [unit](https://app.codecov.io/gh/DawnbrandBots/bastion-bot/pull/463/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DawnbrandBots) | `46.56% <17.54%> (-0.25%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DawnbrandBots#carryforward-flags-in-the-pull-request-comment) to find out more.

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[kevinlul]

@AlphaKretin Could you review if this approach will allow us to extend to other use cases? e.g. TCG Speed Duel Skills, Duel Links Skills, Duel Links-exclusive cards