Consolidate duplicated editor code, trim comments, refresh README

Split GraphCanvas (1076 -> 831 lines) into EdgeLayer and graphMenus;
the port and marker menus were the same list and are now one function.
Value specs of the inspector and the list tab share valueSpecs.ts, and
the remaining copies (compound commands, type glyphs, typed asset
lookup, name rule, play/editor world setup, marquee) are merged.

Four copies had already drifted apart; merging them fixes:
- "Disconnect N links" in the port menu is one undo step, not N
- "+ Add collider" is hidden on a placed container instance, as in
  the hierarchy menu, instead of always failing
- a bool property coerced from the text "false" becomes false
- a port command on an unknown node type reports instead of crashing

Comment-only edits leave the bundle byte-identical. README corrected in
35 places (step limit, jump-run clock, suite duration, 409 body, ...).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/core/commands/containerCommands.ts

@@ -20,11 +20,8 @@ import { nextAssetName } from './naming';
 import { requireObject, requireHolder, requireStructural } from './require';
 
 /**
- * Turns the selected objects, with everything parented below them, into a container asset placed
- * in their stead. The origin is the centre of the selection's bounding box (z = 0), so the template
- * is centred around (0, 0, 0). The objects themselves leave the holder – the placed container
- * shows them again, resolved from the template. It goes below the roots' shared parent, or at the
- * top level when they do not share one.
+ * Turns the selected objects and their descendants into a container asset placed in their stead, the
+ * template centred on the selection's bounding box (z = 0).
  */
 export class CreateContainerCommand implements Command {
   readonly label = 'Create container';