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/renderer/extensions/vueNodes/composables/useSlotElementTracking.ts

@@ -5,7 +5,8 @@
  * positions in a single batched pass, and caches offsets so that node moves
  * update slot positions without DOM reads.
  */
-import { type Ref, onMounted, onUnmounted, watch } from 'vue'
+import { onMounted, onUnmounted, watch } from 'vue'
+import type { Ref } from 'vue'
 
 import { useSharedCanvasPositionConversion } from '@/composables/element/useCanvasPositionConversion'
 import { LiteGraph } from '@/lib/litegraph/src/litegraph'