Add achievements to base game

- Add a script to generate achievement data from Steamworks API
- Add achievements page with a link in sidebar
- Calculate achievements (1/min) with an engine counter
- Store achievements with a timestamp on unlocked in the PlayerObject
- Add a script to generate monochrome icons from Steam icons
- Add toast when unlocking an achievement

tools/README.md

@@ -10,3 +10,13 @@ It decodes the save and prettifies the output. Canno be used to modify a save ga
 ```sh
 node ./pretty-save.js 'C:\\Users\\martin\\Desktop\\bitburnerSave_1641395736_BN12x14.json' 'C:\\Users\\martin\\Desktop\\pretty.json'
 ```
+
+## Fetch Steam Achievements Data
+
+Used to synchronize the achievements info in steamworks to the game's data.json
+
+**Usage**
+```sh
+# Get your key here: https://steamcommunity.com/dev/apikey
+node fetch-steam-achievements-data.js DEVKEYDEVKEYDEVKEYDEVKEY
+```