G5: Symbol Options Export Type (Graphic / Movie Clip)

Store Export Type on symbols for Animate handoff; New Symbol and Symbol Options set it, and symbol.list reports it.

docs/mcp.md

@@ -987,8 +987,10 @@ Guides) can't be picked. An artboard guide is picked, drawn and snapped to acros
 These families are in the live catalog (`command_list` / `vectorcraft://commands`); the prompt `trace-and-style`
 already walks Image Trace. Short agent entry points:
 
-- Symbols: `symbol.list`, `symbol.new {name?, ids?}`, `symbol.place {name?, x?, y?}`, `symbol.breakLink {ids?}`,
-  `symbol.replace`, `symbol.edit`, `symbol.duplicate`, `symbol.selectInstances {name}`.
+- Symbols: `symbol.list` (each row includes `registration` 0..8 and `exportType`: `movieClip`|`graphic`),
+  `symbol.new {name?, registration?, exportType?, ids?}`, `symbol.options {name?, newName?, registration?, exportType?}`,
+  `symbol.place {name?, x?, y?}`, `symbol.breakLink {ids?}`, `symbol.replace`, `symbol.edit`, `symbol.duplicate`,
+  `symbol.selectInstances {name}`.
 - Brushes: `brush.list`, `brush.get {name}`, `brush.apply {name, ids?}`, `brush.new {type, name?, params?, ids?}`,
   `brush.setCurrent {name}`, `brush.options {name, params?}`, `brush.freehand`, `object.expandBrush {ids?}`.
 - Variables: `variable.list`, `variable.define {name, kind: text|visibility|image|graph}`, `variable.bind {variable, ids?}`,