Style: Font Consistency (#7220)

## Summary

Reduce lower level font definitions in most places. Default to Inter.

See #6912 

## Review Focus

Comic Sans is still an option...

## Screenshots (if applicable)

<!-- Add screenshots or video recording to help explain your changes -->

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7220-Style-Font-Consistency-2c26d73d365081348f2dd8909dd9bb8f)
by [Unito](https://www.unito.io)

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: github-actions <github-actions@github.com>

tests-ui/tests/litegraph/core/__snapshots__/litegraph.test.ts.snap

@@ -20,7 +20,7 @@ LiteGraphGlobal {
   },
   "ContextMenu": [Function],
   "CurveEditor": [Function],
-  "DEFAULT_FONT": "Arial",
+  "DEFAULT_FONT": "Inter",
   "DEFAULT_GROUP_FONT": 24,
   "DEFAULT_GROUP_FONT_SIZE": undefined,
   "DEFAULT_POSITION": [
@@ -33,7 +33,7 @@ LiteGraphGlobal {
   "EVENT": -1,
   "EVENT_LINK_COLOR": "#A86",
   "GRID_SHAPE": 6,
-  "GROUP_FONT": "Arial",
+  "GROUP_FONT": "Inter",
   "Globals": {},
   "HIDDEN_LINK": -1,
   "INPUT": 1,
@@ -65,7 +65,7 @@ LiteGraphGlobal {
   "NODE_DEFAULT_COLOR": "#333",
   "NODE_DEFAULT_SHAPE": 2,
   "NODE_ERROR_COLOUR": "#E00",
-  "NODE_FONT": "Arial",
+  "NODE_FONT": "Inter",
   "NODE_MIN_WIDTH": 50,
   "NODE_MODES": [
     "Always",