revert the timezone setting flow to use autocomplete

[laralove143]

for those of you that don't know/remember, timezoner used to suggest timezones as you typed into the /timezone command, it was simpler and faster

but even tho it said to type your city/state/country people kept typing timezone abbreviations like EST, which can't be used since it is (or it might be in the future) ambiguous whether the location uses daylight saving, so this brings us to 3 options

1. keep it as it is, its fine
2. add this, show the individual locations on EST etc and hope that no more than 20 locations exist (i will hate you if you pick this)
3. add this, add an option "don't see your timezone?" which falls back to the current approach
4. idk suggest ur idea