This PR adds the initial framework for loading a file named dashoptions.tbl from a packfile in the loaded TC mod directory. The intent with this PR is to expose functionality to mod developers that has been "hardcoded" and out of each to them since the game's release. This functionality has long been desired by the modding community.

I will of course note that this is just the initial framework and a handful of the most commonly-requested basic options. This can and should be expanded over time (there are many more options I plan to add support for).

Currently here's what's supported:

• Loading the dashoptions.tbl file (only when the game launches with a TC mod)
• Parsing the dashoptions.tbl file, ignoring comments, and pulling supported options from it using RF's standard tbl syntax
• Setting variables based on the options provided by the mod developer in dashoptions.tbl (string, int, float, bool, color currently supported)
• Tracking whether a specific option has been set via dashoptions.tbl so that Dash can take action based on either the value provided, or the mere fact that a value has been provided
• The list of options provided below

Here are the options available in the dashoptions.tbl file along with their default values. I will create a page on the wiki to fully detail all of this, and I also have a fully commented example dashoptions.tbl file, I'm just not sure where to put it (normally I'd say in dashfaction.vpp, but that would be loaded by the game as a set of defaults, which is not what I want)

#General
$Use Base Game Players Config: false
$Ignore Swap Assault Rifle Controls: false
$Ignore Swap Grenade Controls: false
$Disable Multiplayer Button: false
$Disable Singleplayer Buttons: false
$Assault Rifle Ammo Counter Color: "FF0000FF"
$Precision Rifle Scope Color: "00B4005A"
$Sniper Rifle Scope Color: "B400005A"
$Rail Driver Fire Glow Color: "80FFFFFF"
$Rail Driver Fire Flash Color: "80FFFFFF"
$Scoreboard Logo: "score_rflogo.tga"
$Default Geomod Mesh: "Holey01.v3d"
$Driller Double Geomod Mesh: "bit_driller_double.v3d"
$Driller Single Geomod Mesh: "bit_driller_single.v3d"
$APC Geomod Mesh: "Holey_APC.v3d"
$Default Geomod Smoke Emitter: "geomod smoke"
$Driller Geomod Smoke Emitter: "geomod smoke in driller"
$Ice Geomod Texture: "ice_ice01.tga"
$First Level Filename: "l1s1.rfl"
$Training Level Filename: "train01.rfl"
$Summoner Trailer Button Action: 0
+Summoner Trailer Button Bink Filename: "intro.bik"
+Summoner Trailer Button URL: "https://factionfiles.com"
#End

This PR:
Resolves #190
Resolves #105
Resolves #119
Resolves #235
Resolves #173 (mostly)
Lays foundation to eventually address everything in #165