* Move limit enforcement to accepting site ownerhsip transfer
* enforce pageview limit on ownership transfer accept
* Refactor plan limit check logic
* Extract `ensure_can_take_ownership` to `Invitations` context and refactor
* Improve styling of exceeded limits notice in invitation dialog and disable button
* styling improvements to notice
* make transfer_ownership return transfer to self error
* do not allow transferring to user without active subscription WIP
* Add missing typespec and improve existing ones
* Fix formatting
* Explicitly label direct match on function argument for clarity
* Slightly refactor `CreateInvitation.bulk_transfer_ownership_direct`
* Exclude quota enforcement tests from small build test suite
* Remove unused return type from `invite_error()` union type
* Do not block plan upgrade when there's pending ownership transfer
* Don't block and only warn about missing features on transfer
* Remove `x-init` attribute used for debugging
* Add tests for `Quota.monthly_pageview_usage/2`
* Test and improve site admin ownership transfer actions
* Extend tests for `AcceptInvitation.transfer_ownership`
* Test transfer ownership controller level accept action error cases
* Test choosing plan by user without sites but with a pending ownership transfer
* Test invitation x-data in sites LV
* Remove sitelocker trigger in invitation acceptance code and simplify logic
* Add Quota test for `user.allow_next_upgrade_override` being set
* ignore pageview limit only when subscribing to plan
* Use sandbox Paddle instance for staging
* Use sandbox paddle key for staging and dev
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Co-authored-by: Robert Joonas <robertjoonas16@gmail.com>