Add system prompt and tool permission to agent2 (#35781)

Release Notes:

- N/A

---------

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>

crates/agent2/src/tools/glob.rs

@@ -46,6 +46,10 @@ impl AgentTool for GlobTool {
             .into()
     }
 
+    fn needs_authorization(&self, _input: Self::Input, _cx: &App) -> bool {
+        false
+    }
+
     fn run(self: Arc<Self>, input: Self::Input, cx: &mut App) -> Task<Result<String>> {
         let path_matcher = match PathMatcher::new([&input.glob]) {
             Ok(matcher) => matcher,