style: format tracked files and ignore generated data exports

`prettier --check .` failed on 22 files, so gating CI on `npm run lint` was
never going to pass. These changes are whitespace only.

Adds the two remaining generated data exports to .prettierignore so this class
of churn cannot recur, along with machine-local settings files.

postcss.config.js

@@ -1,6 +1,6 @@
 export default {
-  plugins: {
-    tailwindcss: {},
-    autoprefixer: {},
-  },
-}
+	plugins: {
+		tailwindcss: {},
+		autoprefixer: {}
+	}
+};