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/core/graph/subgraph/proxyWidgetUtils.ts

@@ -1,7 +1,5 @@
-import {
-  type ProxyWidgetsProperty,
-  parseProxyWidgets
-} from '@/core/schemas/proxyWidget'
+import { parseProxyWidgets } from '@/core/schemas/proxyWidget'
+import type { ProxyWidgetsProperty } from '@/core/schemas/proxyWidget'
 import type {
   IContextMenuValue,
   LGraphNode