feat(tools): add Firecrawl cloud browser provider (#5628)

* feat(tools): add Firecrawl cloud browser provider

Adds Firecrawl (https://firecrawl.dev) as a cloud browser provider
alongside Browserbase and Browser Use. All browser tools route through
Firecrawl's cloud browser via CDP when selected.

- tools/browser_providers/firecrawl.py — FirecrawlProvider
- tools/browser_tool.py — register in _PROVIDER_REGISTRY
- hermes_cli/tools_config.py — add to onboarding provider picker
- hermes_cli/setup.py — add to setup summary
- hermes_cli/config.py — add FIRECRAWL_BROWSER_TTL config
- website/docs/ — browser docs and env var reference

Based on #4490 by @developersdigest.

Co-Authored-By: Developers Digest <124798203+developersdigest@users.noreply.github.com>

* refactor: simplify FirecrawlProvider.emergency_cleanup

Use self._headers() and self._api_url() instead of duplicating
env-var reads and header construction.

* fix: recognize Firecrawl in subscription browser detection

_resolve_browser_feature_state() now handles "firecrawl" as a direct
browser provider (same pattern as "browser-use"), so hermes setup
summary correctly shows "Browser Automation (Firecrawl)" instead of
misreporting as "Local browser".

Also fixes test_config_version_unchanged assertion (11 → 12).

---------

Co-authored-by: Developers Digest <124798203+developersdigest@users.noreply.github.com>

hermes_cli/config.py

@@ -868,6 +868,13 @@ OPTIONAL_ENV_VARS = {
         "password": True,
         "category": "tool",
     },
+    "FIRECRAWL_BROWSER_TTL": {
+        "description": "Firecrawl browser session TTL in seconds (optional, default 300)",
+        "prompt": "Browser session TTL (seconds)",
+        "tools": ["browser_navigate", "browser_click"],
+        "password": False,
+        "category": "tool",
+    },
     "CAMOFOX_URL": {
         "description": "Camofox browser server URL for local anti-detection browsing (e.g. http://localhost:9377)",
         "prompt": "Camofox server URL",