Add Semrush plugin

[Sakib25800]

Description

This PR adds a new Semrush plugin.

Testing

• [ ] Audit
  • [ ] Confirm site audit settings are updated
  • [ ] Confirm first time site audit message is shown
  • [ ] Confirm site audits can be run
  • [ ] Confirm when a site audit is completed it displays the site audit report
  • [ ] Confirm pressing an audit error leads to the associated issue report
  • [ ] Issue report
  • [ ] Confirm the associated issue solution and description is shown
  • [ ] Confirm the affected pages are shown
• [ ] Keywords
  • [ ] Confirm keyword search allows for infinite scrolling
  • [ ] Confirm keyword search handles case where no keywords returned
  • [ ] Confirm pressing on certain columns allows for sorting
  • [ ] Confirm ability to switch between search type (broad / question / full search)
• [ ] Project
  • [ ] Confirm the associated Semrush project is displayed
  • [ ] Confirm new Semrush project is created when the current Framer project has no existing associated project

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