Rename translation script to something more obvious

[Zughy]

Right now the file name is mtt_update.py, where I suppose the 2nd "t" stands for translate. It took me a bit before finding it in the util folder, as I consider the title not obvious (and I was helped by the latest commits name next to the files). All the other files in the util folder are straightforward.

Suggestions:

• mod_translations_update
• translations_update
• I don't know, but I'd avoid specifying the .tr format in case Minetest starts supporting new formats such as .po§

I also suggest doing that before 5.8, so to avoid linking problems

[Wuzzy2]

Yeah, agreed. mtt stands for Minetest Translation Tools because I pulled it directly from my script collection of the same name. So this part is just a "historical" artifact. MTT also includes a checker script which has not been included officially so far.
https://codeberg.org/Wuzzy/Minetest_Translation_Tools

I'm not sure which name to choose. And please add this to the 5.8 milestone because it should def. be done before release.

[srifqi]

• translation_updater.py
• mod_translation_updater.py (signifying for mods)
• tr_updater.py (tr as in .tr files)
• mod_tr_updater.py
• updatetr.py (like updatepo.sh)

[Zughy]

I think mod_translation_updater.py instantly conveys what it does, +1 for me

[srifqi]

So, the changes are

• util/mtt_update.py -> util/mod_translation_updater.py
• util/README_mtt_update.md -> util/README_mod_translation_updater.md

[Wuzzy2]

Oh lol, I was about to do this myself today but someone was faster. :D

Thanks.