Cleanup example notebooks and make them compile again

[terrorfisch]

• Makes all example notebooks use the default matplotlib backend
• Add hatch command to clean all metadata and reset execution state
• Cleans all metadata and resets
• Skip hardware dependent notebook execution for doc building

[terrorfisch]

There are still undetereministic outputs in the notebooks which is probably a thing we have to accept.

[github-actions[bot]]

Test Results

    3 files      3 suites   3m 45s :stopwatch: 1 196 tests 1 135 :white_check_mark:  61 :zzz: 0 :x: 3 588 runs  3 405 :white_check_mark: 183 :zzz: 0 :x:

Results for commit 0ecb08b0.

[terrorfisch]

Merging since only the upload of the test results faiöed