feat: add models scan and fallbacks

src/commands/models.ts

@@ -0,0 +1,14 @@
+export { modelsListCommand, modelsStatusCommand } from "./models/list.js";
+export {
+  modelsAliasesAddCommand,
+  modelsAliasesListCommand,
+  modelsAliasesRemoveCommand,
+} from "./models/aliases.js";
+export {
+  modelsFallbacksAddCommand,
+  modelsFallbacksClearCommand,
+  modelsFallbacksListCommand,
+  modelsFallbacksRemoveCommand,
+} from "./models/fallbacks.js";
+export { modelsScanCommand } from "./models/scan.js";
+export { modelsSetCommand } from "./models/set.js";