Add tray icon and user-customizable language order

[eugenesvk]

Currently testing if I could replace another language indicator app with this one by changing AHK the icon for the main script whenever a change is detected

Currently only tested with 2 languages. If language icon doesn't exist, the default AHK is used. If no user languages are configured, then as before the currently active language is used as the first one

Noticed that it's slower vs a dedicated app, would you know if that's just because AHK is slow or due to the poll frequency (though see below, chaning from 100 to 10 doesn't seem to affect it) or maybe there is some other reason (maybe this check should be decoupled from anything caret-related in case there is some expensive operation there?)

see from 4 to 6 sec, left icon is app - changing immediately on layout change, right is current script, skipping some changes
https://github.com/user-attachments/assets/bbe6bd32-6ff9-40a1-8a67-d911d416303a

I've changed updatePeriod: 100, to 10, but it doesn't seem to make much of a difference

LangIndic.10.mp4

Addresses #15

[yakunins]

I am looking over 👽

[eugenesvk]

By the way, maybe there should be a single timer that detects layout change instead of 2 separate ones - checking for layout change?

FYI I've added such a single timer CheckLangCapsChange()
that checks whether any of the relevant conditions changed (language / caps status / caret position (for caret cursor only)) and then call updates to caret/pointer/tray only if needed (e.g., tray doesn't update on caps change, pointer doesn't update on caret position change).

Though that fork is all transitioned to modules (so require the latest 2.1 alpha) so that I could import it in my main script (instead of running a separate tray icon) and avoid conflicts with the various libraries this repo uses, but that might be too high of a requirement for the main repo

[yakunins]

maybe there should be a single timer that detects layout change instead of 2 separate ones - checking for layout change?

It wouldn't make any noticable difference.
Because checkin layout change with GetInputLocaleId took only 1/200 of millisecond of CPU time (1 core).
So, checking layout every 40ms (25 fps) will result in utilization of 1/8000 of one core = 0.01%

There's no need to optimize anything here.

[eugenesvk]

And maybe having separate timers might be better since you could than make the "buggier" caret timer less frequent vs the tray/mouse one? (though sadly that might also not help)