[Feature] Display boosted posts on web profile

[S0yKaf]

Description

If this is a code change, please include a summary of what you've coded, and link to the issue(s) it closes/implements.

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This pull request makes it possible to view boosted posts on an accounts web profile. It's also possible to disable this feature via a new setting on the settings page.

closes #926

Checklist

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• [x] I/we have read the GoToSocial contribution guidelines.
• [x] I/we have discussed the proposed changes already, either in an issue on the repository, or in the Matrix chat.
• [x] I/we have not leveraged AI to create the proposed changes.
• [x] I/we have performed a self-review of added code.
• [x] I/we have written code that is legible and maintainable by others.
• [x] I/we have commented the added code, particularly in hard-to-understand areas.
• [x] I/we have made any necessary changes to documentation.
• [ ] I/we have added tests that cover new code.
• [x] I/we have run tests and they pass locally with the changes.
• [x] I/we have run go fmt ./... and golangci-lint run.

[tsmethurst]

Thanks! Will take a look at this after we've finished the 0.17.0 release cycle, so it can be included in 0.18.0 if all goes well :)

[S0yKaf]

No worries, keep up the good work!