Integrate document-format storage into the editor (#4265)

* Integrate document-format storage into the editor

* Address review feedback: drop redundant clones and dedupe metadata traversal

* Extract DocumentHistory and move storage-metadata tests to their own file

* Extract storage diffing/IO, gate validation and .gdd save behind preferences, restructure tests

* Address PR review: save-format/path consistency, autosave persistence, and view-settings/diff fixes

* Skip storage remount on .gdd open and split value/timestamp drift in attribute diff

* Rename storage tests module and surface .gdd open failures with per-resource diff detail

* Add debug-menu toggle to hide the storage preferences section

* Hopefully fix async tests

* Shorten comments

* Fix tests

* Review

* Review

* Review

* Block on future mesages in tests

* Review

* Shorten comments

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Co-authored-by: Timon <me@timon.zip>

Cargo.lock

@@ -2282,11 +2282,14 @@ dependencies = [
  "bitflags 2.11.0",
  "color",
  "derivative",
+ "document-container",
+ "document-format",
  "dyn-any",
  "env_logger",
  "futures",
  "glam",
  "graph-craft",
+ "graph-storage",
  "graphene-hash",
  "graphene-std",
  "graphite-proc-macros",