[apps] Add tool_suggest tool. (#14287)

- [x] Add tool_suggest tool.
- [x] Move chatgpt/src/connectors.rs and core/src/connectors.rs into a
dedicated mod so that we have all the logic and global cache in one
place.
- [x] Update TUI app link view to support rendering the installation
view for mcp elicitation.

---------

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codex-rs/core/src/tools/js_repl/mod.rs

@@ -1360,14 +1360,17 @@ impl JsReplManager {
 
         let router = ToolRouter::from_config(
             &exec.turn.tools_config,
-            Some(
-                mcp_tools
-                    .into_iter()
-                    .map(|(name, tool)| (name, tool.tool))
-                    .collect(),
-            ),
-            None,
-            exec.turn.dynamic_tools.as_slice(),
+            crate::tools::router::ToolRouterParams {
+                mcp_tools: Some(
+                    mcp_tools
+                        .into_iter()
+                        .map(|(name, tool)| (name, tool.tool))
+                        .collect(),
+                ),
+                app_tools: None,
+                discoverable_tools: None,
+                dynamic_tools: exec.turn.dynamic_tools.as_slice(),
+            },
         );
 
         let payload = if let Some((server, tool)) = exec