Add support for colored patterns (#2062)

## Description:

Add support for colored territory patterns/skins

* Refactored & updated territory pattern rendering to render colored
skins
* rename public from pattern to skin (keep pattern name internally, too
difficult to rename)
* Moved all territory color logic to PlayerView
* Updated WinModal to show colored skins
* Refactored decode logic into a separate function: decodePatternData
* Refactored/updated how cosmetics are sent to server. Players now send
a PlayerCosmeticRefsSchema in the ClientJoinMessage.
PlayerCosmeticRefsSchema just contains names of the cosmetics, and the
server replaces the names/references with actual cosmetic data
* Refactored PastelThemeDark: have it extend Pastel theme so duplicate
logic can be removed.
* 

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evan

src/client/graphics/SpriteLoader.ts

@@ -171,10 +171,9 @@ export const getColoredSprite = (
   customTerritoryColor?: Colord,
   customBorderColor?: Colord,
 ): HTMLCanvasElement => {
-  const owner = unit.owner();
   const territoryColor: Colord =
-    customTerritoryColor ?? theme.territoryColor(owner);
-  const borderColor: Colord = customBorderColor ?? theme.borderColor(owner);
+    customTerritoryColor ?? unit.owner().territoryColor();
+  const borderColor: Colord = customBorderColor ?? unit.owner().borderColor();
   const spawnHighlightColor = theme.spawnHighlightColor();
   const key = computeSpriteKey(unit, territoryColor, borderColor);
   if (coloredSpriteCache.has(key)) {