docs(themes): update themes documentation (@Leonabcd123)

Author: Leonabcd123

docs/CONTRIBUTING.md

@@ -58,7 +58,7 @@ Before submitting a theme make sure...
 
 - your theme is unique and isn't visually similar to any we already have.
 - the text color is either black or white (or very close to these colors)
-- your theme has been added to the `_list` file and the `textColor` property is the theme's main color
+- your theme has been added to the [packages/schemas/src/themes.ts](/packages/schemas/src/themes.ts) and [frontend/src/ts/constants/themes.ts](/frontend/src/ts/constants/themes.ts) files and the `textColor` property is the theme's main color
 - your theme is clear and readable with both `flip test colors` and `colorful mode` enabled and disabled
 
 If you want to contribute themes but don't know how, check [THEMES.md](/docs/THEMES.md)

docs/THEMES.md

@@ -15,7 +15,7 @@ First you will have to make a personal copy of the Monkeytype repository, also k
 
 Pick a name for your theme. It must be all lowercase, with spaces replaced by underscores.
 
-Go to `./packages/schemas/src/themes.ts` and add your new theme name to the __end__ of the `ThemeNameSchema` enum. Make sure to end the line with a comma.
+Go to [packages/schemas/src/themes.ts](/packages/schemas/src/themes.ts) and add your new theme name to the __end__ of the `ThemeNameSchema` enum. Make sure to end the line with a comma.
 
 ```typescript
 export const ThemeNameSchema = z.enum([
@@ -26,7 +26,7 @@ export const ThemeNameSchema = z.enum([
 ]);
 ```
 
-Then, go to `./frontend/src/ts/constants/themes.ts` and add the following code to the __end__ of the `themes` object near to the very end of the file:
+Then, go to [frontend/src/ts/constants/themes.ts](/frontend/src/ts/constants/themes.ts) and add the following code to the __end__ of the `themes` object near to the very end of the file:
 
 ```typescript
 export const themes: Record<ThemeName, Theme>  = {