Refactor round: ship web/index.html, drop the remote browser, fix stale comments and README

- `.gitignore` said `index.html` unanchored, which also caught the Vite source page;
  a fresh clone could neither `dev` nor `build`. Anchored to `/index.html`, page added.
- Removed GM_REMOTE (tools/remote/gm-browser.ps1 and the ssh/scp branch in browser.mjs):
  the Windows test machine is gone and the only flaky check that lived on it is closed (#37).
- Removed `npm run preview`, undocumented and unused.
- Comments: wrong number in collider.test.ts (250 → 200), the "declarations used to…"
  history in listItems.ts and friends, the 24 px/28 contradiction, section banners in
  nodes/index.ts, node-catalog.test.ts and api/index.php, name paraphrases, and the stale
  step numbers in tools/e2e/11-…23- from the old global count.
- README: asset types include `animation`, kind order Number/Text/Boolean, tagged colour
  and texture items, 6/5 kinds, the `Texture` node, `./build.sh`, PROJECT_FORMAT_VERSION,
  and the file tree (kinds.ts, listItems.ts, propertyPorts.ts, Breadcrumb.ts, beads.ts,
  tools/assets/).
- tests/helpers.ts takes the duplicated `findObject` and `sceneWithCamera`.

Proof: ./check.sh 797 tests, full e2e ALL PASSED 633 checks against this bundle.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/core/graph/nodes/index.ts

@@ -83,7 +83,6 @@ import { Variables } from './variable/Variables';
  * the order here is documentation only.
  */
 export const BUILT_IN_NODES: readonly NodeDef[] = [
-  // events
   OnStart,
   OnUpdate,
   OnKeyDown,
@@ -96,15 +95,12 @@ export const BUILT_IN_NODES: readonly NodeDef[] = [
   OnClick,
   OnAnimationFinished,
   BehaviorStart,
-  // flow
   Branch,
   Sequence,
   Repeat,
   RunBehavior,
   BehaviorEnd,
-  // variables
   Variables,
-  // data: references and properties
   Self,
   Owner,
   Parent,
@@ -114,7 +110,6 @@ export const BUILT_IN_NODES: readonly NodeDef[] = [
   IsEnabled,
   Properties,
   GetPosition,
-  // data: literals and math
   NumberLiteral,
   BooleanLiteral,
   StringLiteral,
@@ -134,7 +129,6 @@ export const BUILT_IN_NODES: readonly NodeDef[] = [
   Modulo,
   Random,
   Time,
-  // data: text and comparison
   ToText,
   ToNumber,
   Join,
@@ -145,7 +139,6 @@ export const BUILT_IN_NODES: readonly NodeDef[] = [
   And,
   Or,
   Not,
-  // data: lists
   ListLiteral,
   Fill,
   Count,
@@ -154,10 +147,8 @@ export const BUILT_IN_NODES: readonly NodeDef[] = [
   SubList,
   Concat,
   IndexOf,
-  // data: structs
   PackStruct,
   ExpandStruct,
-  // data: vectors and input
   Length,
   Distance,
   Normalize,
@@ -167,7 +158,6 @@ export const BUILT_IN_NODES: readonly NodeDef[] = [
   MouseButton,
   IsHovered,
   IsTouching,
-  // actions
   Move,
   SetPosition,
   Spawn,