feat(ui): update model identifier to be key (wip)

- Update most model identifiers to be `{key: string}` instead of name/base/type. Doesn't change the model select components yet.
- Update model _parameters_, stored in redux, to be `{key: string, base: BaseModel}` - we need to store the base model to be able to check model compatibility. May want to store the whole config? Not sure...

invokeai/frontend/web/src/features/canvas/store/canvasSlice.ts

@@ -626,7 +626,7 @@ export const canvasSlice = createSlice({
   },
   extraReducers: (builder) => {
     builder.addCase(modelChanged, (state, action) => {
-      if (action.meta.previousModel?.base_model === action.payload?.base_model) {
+      if (action.meta.previousModel?.base === action.payload?.base) {
         // The base model hasn't changed, we don't need to optimize the size
         return;
       }