In-place pack mod updating

[Caedis]

This is mainly for me, but it could be useful to other devs who update to nightly often.
Currently, this is mods only. Configs are not touched.

generate_nightly will need to be ran before hand

poetry run python -m gtnh.cli.generate_nightly --update-available
poetry run python -m gtnh.cli.update_pack_inplace [--use-symlink] <Side> "<.minecraft path>"

Side can be one of: CLIENT, SERVER, CLIENT_JAVA9, SERVER_JAVA9
The --use-symlink flag can be supplied if you want mods to be symlinked from the cache (only on posix systems)

An example to update the mods on my server:
poetry run python -m gtnh.cli.update_pack_inplace SERVER_JAVA9 "/mnt/rootshare/appdata/minecraft/gtnh/"

and on my local computer:
poetry run python -m gtnh.cli.update_pack_inplace CLIENT_JAVA9 "/mnt/games/Minecraft/Instances/GTNH Nightly/.minecraft/"

Quotes are only needed if the path contains spaces which can be escaped instead if you want.

To have certain mods excluded from the local pack, create a .inplace_mod_exclusions file in the root of the project and include the mod names from gtnh-assets.json

Example (I use RTG + CC, ModernControlling, and Xaero's)

Realistic-World-Gen
DefaultWorldGenerator
Controlling
JourneyMap
JourneyMap Server

[Caedis]

Note, it will not catch custom versions of jars in the pack (like a -pre tag you built and tagged locally)

[Caedis]

First thing I have really done in python, so please give any criticism.

[mitchej123]

seems reasonable enough

[Caedis]

Gonna hold off until the other PR is merged so I can make logging changes here as well