refactor: single source of truths with editor interface (#10178)

* refactor device to editor interface and derive styles panel

* allow host app to control form factor and ui mode

* add editor interface event listener

* put new props inside UIOptions

* refactor: move related apis into one file

* expose getFormFactor

* privatize the setting of desktop mode and fix snapshots

* refactor and fix test

* remove unimplemented code

* export getFormFactor()

* replace `getFormFactor` with `getEditorInterface`

* remove dead & useless

* comment

* fix ts

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Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>

packages/excalidraw/appState.ts

@@ -127,7 +127,6 @@ export const getDefaultAppState = (): Omit<
     searchMatches: null,
     lockedMultiSelections: {},
     activeLockedId: null,
-    stylesPanelMode: "full",
   };
 };
 
@@ -253,7 +252,6 @@ const APP_STATE_STORAGE_CONF = (<
   searchMatches: { browser: false, export: false, server: false },
   lockedMultiSelections: { browser: true, export: true, server: true },
   activeLockedId: { browser: false, export: false, server: false },
-  stylesPanelMode: { browser: false, export: false, server: false },
 });
 
 const _clearAppStateForStorage = <