fix(sdk): stop publishing unresolvable ui dependency + leaked types

The SDK bundles @workflowbuilder/ui and @base-ui/react into its dist, but
declared them as runtime dependencies - so a published @workflowbuilder/sdk
would 404 on @workflowbuilder/ui (not published) at npm install. Move both to
devDependencies (they are inlined, consumers don't install them).

Add @workflowbuilder/ui to the dts plugin's bundledPackages so its types are
inlined into dist/index.d.ts instead of leaking unresolvable
import('@workflowbuilder/ui') references into the public type surface. Verified:
no real ui/base-ui imports remain in dist/index.d.ts.

Remove the obsolete docs/overflow-ui.md (described the old external
@synergycodes/overflow-ui local-dev flow this migration replaces).

Author: librowski-synergy

docs/overflow-ui.md

@@ -76,11 +76,9 @@
     "zustand": "^5.0.0"
   },
   "dependencies": {
-    "@base-ui/react": "catalog:",
     "@cfworker/json-schema": "4.1.1",
     "@fontsource/poppins": "^5.2.7",
     "@phosphor-icons/react": "^2.1.7",
-    "@workflowbuilder/ui": "workspace:*",
     "ace-builds": "^1.43.4",
     "ajv": "catalog:",
     "clsx": "^2.1.1",
@@ -91,13 +89,15 @@
     "remeda": "^2.19.2"
   },
   "devDependencies": {
+    "@base-ui/react": "catalog:",
     "@jsonforms/core": "^3.4.1",
     "@jsonforms/react": "^3.4.1",
     "@testing-library/react": "^16.3.0",
     "@types/react": "catalog:",
     "@vitejs/plugin-react": "^4.3.4",
     "@workflow-builder/icons": "workspace:*",
     "@workflow-builder/types": "workspace:*",
+    "@workflowbuilder/ui": "workspace:*",
     "eslint-plugin-react": "7.37.2",
     "eslint-plugin-react-hooks": "5.1.0-rc.1",
     "eslint-plugin-tsdoc": "^0.4.0",

packages/sdk/package.json

@@ -46,9 +46,11 @@ export default defineConfig(({ command }) => ({
       include: ['src/**/*'],
       exclude: ['src/**/*.spec.ts', 'src/**/*.spec.tsx', 'src/__shims__/**/*'],
       // Inline types from workspace-internal packages so external consumers
-      // don't need to install them. Icons is bundled into SDK's runtime
-      // (not externalized in Vite's build), and this keeps the types aligned.
-      bundledPackages: ['@workflow-builder/icons'],
+      // don't need to install them. Both packages are bundled into the SDK's
+      // runtime (not externalized in Vite's build), so their types must be
+      // inlined too - otherwise dist/index.d.ts would reference
+      // @workflowbuilder/ui, which the SDK does not declare as a dependency.
+      bundledPackages: ['@workflow-builder/icons', '@workflowbuilder/ui'],
       // The one type we can't reach from source alone — the ai-tools-control
       // depends on a few @jsonforms types we export for consumer convenience.
       insertTypesEntry: true,