build: Use prettier for javascript

Stop ignoring .js and .json files in prettier and fix existing issues.

The `prettier-plugin-multiline-arrays` plugin is used to split arrays
with multiple elements into one line per element.

e2e/tsconfig.json

@@ -1,9 +1,8 @@
 {
-    "extends": "../tsconfig.json",
-    "include": ["**/*.ts"],
-    "compilerOptions": {
-        "sourceMap": false,
-        "types": ["cypress"]
-    }
+  "extends": "../tsconfig.json",
+  "include": ["**/*.ts"],
+  "compilerOptions": {
+    "sourceMap": false,
+    "types": ["cypress"]
+  }
 }
-