feat(tool-web-search): Firecrawl-backed web search tool

New standard tool extension with one tool web_search supporting 4 modes
(search, scrape, crawl, map) against a self-hosted Firecrawl instance.

Pure core: validateArgs (discriminated union by mode) + format* functions
+ truncateOutput. Injected edge: FirecrawlClient (injectable fetchFn/sleep/now,
AbortSignal.any for per-request timeout + caller cancellation). concurrencySafe
true, capabilities network. 38 tests, zero vi.mock.

Live-verified: umans-glm-5.2 called web_search → real Firecrawl results (also
the first live Umans API call).

1 files changed, 1 insertions, 0 deletions

diff --git a/bun.lock b/bun.lock
index c08d7f9..18f4542 100644
--- a/bun.lock
+++ b/bun.lock
@@ -73,6 +73,7 @@
         "@dispatch/tool-edit-file": "workspace:*",
         "@dispatch/tool-read-file": "workspace:*",
         "@dispatch/tool-shell": "workspace:*",
+        "@dispatch/tool-web-search": "workspace:*",
         "@dispatch/tool-write-file": "workspace:*",
         "@dispatch/transport-http": "workspace:*",
         "@dispatch/transport-ws": "workspace:*",