refactor(speedtest.net): all your servers belong to us

[Audionut]

This PR extends the speedtest.net server functions, allowing additional speedtest.net servers to be selected. It hooks into the existing speedtest-go application, allowing to fetch all 'city' based servers already defined in that application, and further extends the server selection process by allowing latitude/longitude based server fetching.

By default, existing local servers only functionality remains. Speedtest.net server maintenance is conducted via a new speedtest settings panel. This allows to fetch the speedtest-go 'city' based servers (comprehensive) and input for lat/long server fetching.

Additionally, a further option allows the server city name to be appended to results, to assist with differentiating the same sponsor servers located in different facilities.

[Audionut]

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[Audionut]

Added city name handling, which will be most useful for individual speedtest history results.
Required database migration.
Old results will not show the city name. Maybe add an option to flush those results.

Cleaned up the settings panel, fixed the theme text display.

Added todo tasks to OP, to fix everything I've noticed that I've broken.

[s0up4200]

We should replace all the emojis used with proper icons from lucide/heroicons (or fontawesome if needed). I think all 3 is in the project already.

(I know it's just a draft yet, just something I noticed)

[Audionut]

I think I got them all. It seems to have improved some redraw issues I was noticing also.

The speedtest latency results have an inconsistency that I can't track down. Literally once in a blue moon, and I haven't noticed it recently.

The only concern I have with this branch, is my inability to force city name to existing schedules. New schedules push their results as expected.