chore: Remove old frontend and all references #492

Job	Run time
General Pull Request Checks / Run Cargo Deny (bans licenses sources)	50s
General Pull Request Checks / Run RustDoc	9m 35s
General Pull Request Checks / Run Cargo Udeps	8m 32s
General Pull Request Checks / Run Cargo Tests	3m 46s
General Pull Request Checks / Run Cargo Deny (advisories)	49s
General Pull Request Checks / All tests passed	0s
Helm Chart Check	0s
Publish ${{ matrix.runner.arch }} Image	0s
Build and publish manifest list	-1s
	23m 31s

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