Audio changes

[Drapersniper]

1 - Allow configuringJava's -Xmx flag (supersedes #5542)
2 - Replace the application.yml in favor of config storage.
3 - Allow toggling sources on and off
4 - Allow changing the managed node binding IP, password, and port.
5 - Allow customizing the framebuffer and NAS buffer
6 - Framework to modify the application YAML is baked in, all it takes to add more stuff (plugins for example) if following the structure currently present.
7 - Added captcha for bot owners for specific llset commands
8 - Reduce the number of config calls in cog_before_invoke by 4
9 - Unify all defaults into a single location to make changing them easier in the future
10 - Add llset reset which resets all changes made by llset
11 - Update docstring for all llset subcommands
12 - llset host|password|port are now only usable if you first enable an external Lavalink server.
13 - llset info update
14 - llset yaml added
15 - audioset info updated
16 - -Xms64M always set.
17 - llset commands will not be available depending on Node mode (i.e llset config will not be available if you run an external mode, llset password will not be available if you run a managed node)
18 - Too many fixes to mention all of them around the shutdown and reconnection logic
19 - llset secured added

Depends on:

Cog-Creators/Red-Lavalink#118
Cog-Creators/Red-Lavalink#117
Cog-Creators/Red-Lavalink#116
Cog-Creators/Red-Lavalink#115
Cog-Creators/Red-Lavalink#114

To Test use: Cog-Creators/Red-Lavalink#113

Before merging there are TODO's and dependencies changes required in the PR which are in place now just to facilitate testing

[aikaterna]

Leaving a reminder to set some memory bounds and that 64mb is alright for a minimum.

[aikaterna]

Keys with dashes in them (yaml__lavalink__server__gc-warnings, yaml__logging__file__max-history, and yaml__logging__file__max-size) can't be registered in Config as - can't be used.

[10:09:36] ERROR [red] Package loading failed
Traceback (most recent call last)
/.../nyaenv/lib/python3.9/site-packages/redbot/core/core_commands.py:174 in _load 
❱ 174 await bot.load_extension(spec) 
/.../nyaenv/lib/python3.9/site-packages/redbot/core/bot.py:1533 in load_extension 
❱ 1533 lib.setup(self) 
/.../nyaenv/lib/python3.9/site-packages/redbot/cogs/audio/__init__.py:7 in setup 
❱ 7 cog = Audio(bot) 
/.../nyaenv/lib/python3.9/site-packages/redbot/cogs/audio/core/__init__.py:171 in __init__ 
❱ 171 self.config.register_global(**default_global) 
/.../nyaenv/lib/python3.9/site-packages/redbot/core/config.py:859 in register_global 
❱ 859 self._register_default(self.GLOBAL, **kwargs) 
/.../nyaenv/lib/python3.9/site-packages/redbot/core/config.py:815 in _register_default 
❱ 815 to_add = self._get_defaults_dict(k, v) 
/.../nyaenv/lib/python3.9/site-packages/redbot/core/config.py:777 in _get_defaults_dict 
❱ 777 raise RuntimeError("'{}' is an invalid config key.".format(k)) 
RuntimeError: 'gc-warnings' is an invalid config key.

[aikaterna]

Also if you're interested, something that could fit in this PR is the non existent llset settings needed for Cog-Creators/Red-Lavalink#107 (but there's also RLL work to do there, too, to support them).

[aikaterna]

I had a bot with an external lavalink server set, then loaded this PR/cog after editing the config values for the application.yml creation, just to test...
"llset external" did nothing
I deleted the settings and restarted the bot so it would be set on internal
The jar was not downloaded
"llset external" doesn't do anything here either
Used "llset yaml" - the bot DMed me the yaml in an embed and then also said "playlist is too large, here is the compressed version" and uploaded the file... besides it sending it 2x, it's not a playlist 😉
Using "llset config server bind" has no user feedback on command use, with or without a host ip/name present, actually seems like most "llset" commands aren't functioning, may be related to the external/internal toggle and what you were saying about denying some command use on external nodes...
There are some phrasing changes I'll suggest at some point as well, but just wanted to get the ball rolling on what I found so far...