feat(onboarding): add web search to onboarding flow (#34009)

* add web search to onboarding flow

* remove post onboarding step (now redundant)

* post-onboarding nudge if no web search set up

* address comments

* fix test mocking

* add enabled: false assertion to the no-key test

* --skip-search cli flag

* use provider that a user has a key for

* add assertions, replace the duplicated switch blocks

* test for quickstart fast-path with existing config key

* address comments

* cover quickstart falls through to key test

* bring back key source

* normalize secret inputs instead of direct string trimming

* preserve enabled: false if it's already set

* handle missing API keys in flow

* doc updates

* hasExistingKey to detect both plaintext strings and SecretRef objects

* preserve enabled state only on the "keep current" paths

* add test for preserving

* better gate flows

* guard against invalid provider values in config

* Update src/commands/configure.wizard.ts

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

* format fix

* only mentions env var when it's actually available

* search apiKey fields now typed as SecretInput

* if no provider check if any search provider key is detectable

* handle both kimi keys

* remove .filter(Boolean)

* do not disable web_search after user enables it

* update resolveSearchProvider

* fix(onboarding): skip search key prompt in ref mode

* fix: add onboarding web search step (#34009) (thanks @kesku)

---------

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>
Co-authored-by: Shadow <hi@shadowing.dev>

src/commands/onboard-types.ts

@@ -154,6 +154,7 @@ export type OnboardOptions = {
   /** @deprecated Legacy alias for `skipChannels`. */
   skipProviders?: boolean;
   skipSkills?: boolean;
+  skipSearch?: boolean;
   skipHealth?: boolean;
   skipUi?: boolean;
   nodeManager?: NodeManagerChoice;