Lint: Add eslint import plugin (#5955)

## Summary

Adds the linter, turns on the recommended and a few extra rules, fixes
existing violations.

Doesn't prohibit `../../...` imports yet, that'll be it's own PR.

## Changes

- **What**: Consistent and fixable imports
- **Dependencies**: The plugin and parser

## Review Focus

How do you feel about the recommended rules?
What about the extra ones?
[Any
more](https://github.com/un-ts/eslint-plugin-import-x?tab=readme-ov-file#rules)
you'd want to turn on?

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5955-Lint-Add-eslint-import-plugin-2856d73d3650819985c0fb9ca3fa94b0)
by [Unito](https://www.unito.io)

src/stores/firebaseAuthStore.ts

@@ -1,11 +1,8 @@
 import { FirebaseError } from 'firebase/app'
 import {
-  type Auth,
   AuthErrorCodes,
   GithubAuthProvider,
   GoogleAuthProvider,
-  type User,
-  type UserCredential,
   browserLocalPersistence,
   createUserWithEmailAndPassword,
   deleteUser,
@@ -17,6 +14,7 @@ import {
   signOut,
   updatePassword
 } from 'firebase/auth'
+import type { Auth, User, UserCredential } from 'firebase/auth'
 import { defineStore } from 'pinia'
 import { computed, ref } from 'vue'
 import { useFirebaseAuth } from 'vuefire'