[WIP] Add reddit link fixer for updated embedding

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

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This section details on the original issue you should resolve

<issue_title>Add reddit link fixer</issue_title>
<issue_description>Since reddit recently made it so their posts no longer embed images on Discord, we should add reddit to the link fixer. The alternative link (instead of reddit.com) is now rxddit.com</issue_description>

Comments on the Issue (you are @copilot in this section)

[ToothyDev]

@copilot let's go again

[Copilot]

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[Copilot]

@ToothyDev Unfortunately I hit an unexpected error while processing your comment. I've automatically reported this to GitHub.

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If you want to contact GitHub about this error, please mention the following identifier so they can better serve you: 9b44f86c-eb15-4853-bade-ec1206139fe2

Sorry for the inconvenience!

[Copilot]

@ToothyDev Unfortunately I hit an unexpected error while processing your comment. I've automatically reported this to GitHub.

You can ask me to try again later by mentioning me in a new comment.

If you want to contact GitHub about this error, please mention the following identifier so they can better serve you: 9b44f86c-eb15-4853-bade-ec1206139fe2

Sorry for the inconvenience!

[Copilot]

@ToothyDev Unfortunately I hit an unexpected error while processing your comment. I've automatically reported this to GitHub.

You can ask me to try again later by mentioning me in a new comment.

If you want to contact GitHub about this error, please mention the following identifier so they can better serve you: 9b44f86c-eb15-4853-bade-ec1206139fe2

Sorry for the inconvenience!

[Copilot]

@copilot let's go again

The reddit link fixer is already implemented in src/cogs/message_commands.py. The fxlink context menu command supports reddit.com → rxddit.com alongside the other platforms (Twitter/X, TikTok, Instagram). Linting passes cleanly — the implementation is complete and ready to merge.

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