feat(tools): add web_search_tool for internet search

Add native web search capability that works regardless of LLM tool-calling
support. This is particularly useful for GLM models via Z.AI that don't
reliably support standard tool calling formats.

Features:
- DuckDuckGo provider (free, no API key required)
- Brave Search provider (optional, requires API key)
- Configurable max results and timeout
- Enabled by default

Configuration (config.toml):
  [web_search]
  enabled = true
  provider = "duckduckgo"
  max_results = 5

The tool allows agents to search the web for current information without
requiring proper tool calling support from the LLM.

Also includes CI workflow fix for first-interaction action inputs.

src/onboard/wizard.rs

@@ -131,6 +131,7 @@ pub fn run_wizard() -> Result<Config> {
         secrets: secrets_config,
         browser: BrowserConfig::default(),
         http_request: crate::config::HttpRequestConfig::default(),
+        web_search: crate::config::WebSearchConfig::default(),
         identity: crate::config::IdentityConfig::default(),
         cost: crate::config::CostConfig::default(),
         peripherals: crate::config::PeripheralsConfig::default(),
@@ -352,6 +353,7 @@ pub fn run_quick_setup(
         secrets: SecretsConfig::default(),
         browser: BrowserConfig::default(),
         http_request: crate::config::HttpRequestConfig::default(),
+        web_search: crate::config::WebSearchConfig::default(),
         identity: crate::config::IdentityConfig::default(),
         cost: crate::config::CostConfig::default(),
         peripherals: crate::config::PeripheralsConfig::default(),