improvement(options): separate some settings into "advanced settings"

[WofWca]

Currently they're all always listed. Doing this can allow us to add some more advanced settings, like

https://github.com/WofWca/jumpcutter/blob/81b4e507b68d9f7c50e90161326edc65038ae28c/src/entry-points/content/StretchingController/StretcherAndPitchCorrectorNode.ts#L39-L40

and maybe some existing ones.

I guess we could add a "Show advanced settings" checkbox, or simply mark (highlight / un-highlight with background, or text) the advanced ones somehow, or put them in a <details> element, idk. I'm not sure if we should create a completely separate section for them or to put them in the existing ones.

Got another idea: assign each setting a value of its "advancedness", and at the top of the page add a slider "advancedness level" that hides all the settings that are more advanced than its value. This slider can be interlinked with #108.

[WofWca]

Consider utilizing the advancedMode setting introduced in #180