Test out and give feedback on frequentpilgrim's sound rebalance y'all

This is the Sound Balance Pull Request (#5569) turned into a Mod for ease of testing. All feedback is super helpful and should go here or into the Sound Channel on the Zero-K discord, or DM it to me if you don't want it public. Your thoughts on the audio as you experience it will all be taken into consideration when patching to version 2.

Post links to battle replays with timestamp for reference if needed.

https://zero-k.info/Battles/Detail/2530714 - This is a replay of a bot vs bot match to quickly see the mod in action and have it downloaded. To host it yourself in a lobby after downloading, from the main menu: Go to Settings -> Lobby and enable 'Show technical mods list'. 'Options' in your self-hosted MP lobby will now have a button for "Select Mod". Players who join will auto-download the mod. Volume Sliders likely will need to be reset/adjusted since levels for sound effects, music, and UI/unit responses are totally different.

Important questions are:

1. Do you prefer this audio compared to the Base games?

2. If there are elements you do not prefer, what are they?

3. What are the situations that seem better, worse, or the same? (1v1, vs AI, small teams, med teams, big teams, early game, late game, sandbox, chickens, specific factory, specific unit being massed, etc).

4. What is your audio setup when giving feedback? (headphones, laptop speakers, big speakers, small speakers, subwoofer, earbuds, etc).

Nearly every sound produced by a buildable unit or structure was adjusted in terms of parameters (volume, how multiple of them firing at once is handled, etc); some sounds had more substantial adjustments and a few were replaced completely.

Nearly everything had some EQ adjustment also. Lots of trimming lengths on audio. Big goal to not let volume get so out of control at times and not be stressing speakers/subwoofers with constant wide frequency/bass.

https://zero-k.info/Forum/Post/256775#256775

This thread as the main basis of understanding the core problem and making adjustments. This PR is not intended as a final fix but as a better starting point to make incremental audio tweaks from a non-broken soundscape. ZK vanilla audio is currently in an unreasonable state. It's my intention to make the minimum necessary changes to get it to a reasonable state.