Include image alt text in post search

[andromxda]

Requirements

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Is your proposal related to a problem?

Images are hard to find, they often aren't well described in the post title or body. The only field that is really meant for image descriptions is the alt text field.

Describe the solution you'd like.

Image posts should be returned if the search query matches the alt text of an image

Describe alternatives you've considered.

Implement a dedicated image search feature?

Additional context

No response

[Nutomic]

This is easy to add, only requires a single line added here: https://github.com/LemmyNet/lemmy/blob/main/crates/db_views/src/post/post_view.rs#L491

[DraconicNEO]

This is easy to add, only requires a single line added here: https://github.com/LemmyNet/lemmy/blob/main/crates/db_views/src/post/post_view.rs#L491

Seems quick and simple enough so I sent a pull request. I did have to do more than one line but still seemed simple enough. What do you think? Did I do good?