This changes the source of a script to an internal url to prevent CSP
errors.
# Which Problems Are Solved
Our documentation feedback script was not loaded due to being blocked by
the CSP
# How the Problems Are Solved
By internally routing to a proxy, we do not have to add external urls to
the CSP
This PR adds a feedback box at the bottom of all the docs pages to help
us track which pages need to be updated or improved. The feedback box is
connected to plausible for event tracking.
---------
Co-authored-by: Max Peintner <[email protected]>
# Which Problems Are Solved
The docs overview pages and navs don't visually distinguish between
deprecated and GA APIs.
This makes it hard to find the right methods for the job already.
As we are implementing the resource API and continously deprecate
obsolete APIs, this only gets worse.
# How the Problems Are Solved
The UI items in docs overview pages are striked through and pushed to
the bottom of the list.
This applies to side navs as well as card lists.
For example, [see management user
methods](https://docs-git-strikethrough-deprecated-apis-zitadel.vercel.app/docs/apis/resources/mgmt/users):

A method is considered deprecated if it has this option set in the
protos rpc definition:
```protobuf
option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
deprecated: true;
}
```
# Additional Changes
None
# Additional Context
- Relates to #9680
---------
Co-authored-by: David Skewis <[email protected]>