feat: rename use of locale to lang where applicable

constants/myPages.js

@@ -1,8 +1,12 @@
-// Due to these records being used in next.config.js, and that is
-// required to be a js file, we use jsdoc to type these.
 /**
- * @typedef {import('../types/lang').Lang} Lang
+ * @file Due to these records being used in next.config.js, and that is required
+ * to be a js file, we use jsdoc to type these.
  */
+
+/**
+ * @typedef {import('@/constants/languages').Lang} Lang
+ */
+
 /** @type {Record.<Lang, string>} */
 export const pageNames = {
   da: "mine-sider",