Support affiliate patterns (#2027)

## Description:

Patterns have an optional affiliateCode that is associated with an
affiliate/youtuber. These patterns are not shown by default. You can see
them by going to openfront.io/#affiliate=XXX


## 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/core/CosmeticSchemas.ts

@@ -44,6 +44,7 @@ export const PatternSchema = z
 export const PatternInfoSchema = z.object({
   name: PatternNameSchema,
   pattern: PatternSchema,
+  affiliateCode: z.string().nullable(),
   product: ProductSchema.nullable(),
 });