Rename Manual profile to Minimal (#29852)

Completely subjective, but I just like it better.

Release Notes:

- N/A

---------

Co-authored-by: Danilo Leal <67129314+danilo-leal@users.noreply.github.com>
Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

crates/agent/src/profile_selector.rs

@@ -93,7 +93,7 @@ impl ProfileSelector {
         let documentation = match profile.name.to_lowercase().as_str() {
             builtin_profiles::WRITE => Some("Get help to write anything."),
             builtin_profiles::ASK => Some("Chat about your codebase."),
-            builtin_profiles::MANUAL => Some("Chat about anything with no tools."),
+            builtin_profiles::MINIMAL => Some("Chat about anything with no tools."),
             _ => None,
         };