[Feature Request] Allow a user to filter on keywords

[zchilds]

Requirements

• [X] Is this a feature request? For questions or discussions use https://lemmy.ml/c/lemmy_support
• [X] Did you check to see if this issue already exists?
• [X] Is this only a feature request? Do not put multiple feature requests in one issue.
• [X] Is this a backend issue? Use the lemmy-ui repo for UI / frontend issues.

Is your proposal related to a problem?

Allow users to create a filter for certain keywords like "Twitter, Reddit" etc

Describe the solution you'd like.

In the "Blocks" page allow users to block keywords from post titles. This would hide all posts containing those words in the title.

Describe alternatives you've considered.

Some apps such as Connect on Android already have this feature, but it would be nice to have it included natively in Lemmy.

Additional context

No response

EDIT from dessalines:

This should also work not just on titles, but also URLs and possibly descriptions.

[grothedev]

is there any specification about what type of filter processing is allowed to be done on the backend?