[style] migrate to @prettier/plugin-oxc for faster formatting

Replace @trivago/prettier-plugin-sort-imports with @prettier/plugin-oxc
and @ianvs/prettier-plugin-sort-imports for improved performance.

Changes:
- Add @prettier/plugin-oxc (Rust-based fast parser)
- Add @ianvs/prettier-plugin-sort-imports (import sorting compatible with oxc)
- Remove @trivago/prettier-plugin-sort-imports
- Update .prettierrc to use new plugins and compatible import order config
- Reformat all files with new plugin configuration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

tests-ui/tests/composables/graph/useSelectionState.test.ts

@@ -1,6 +1,6 @@
 import { createPinia, setActivePinia } from 'pinia'
 import { beforeEach, describe, expect, test, vi } from 'vitest'
-import { type Ref, ref } from 'vue'
+import { ref, type Ref } from 'vue'
 
 import { useSelectionState } from '@/composables/graph/useSelectionState'
 import { useNodeLibrarySidebarTab } from '@/composables/sidebarTabs/useNodeLibrarySidebarTab'

tests-ui/tests/composables/graph/useWidgetValue.test.ts

@@ -1,11 +1,11 @@
 import {
-  type MockedFunction,
   afterEach,
   beforeEach,
   describe,
   expect,
   it,
-  vi
+  vi,
+  type MockedFunction
 } from 'vitest'
 import { ref } from 'vue'