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/prompt_store/src/prompts.rs

@@ -18,7 +18,7 @@ use util::{ResultExt, get_system_shell};
 
 use crate::UserPromptId;
 
-#[derive(Debug, Clone, Serialize)]
+#[derive(Default, Debug, Clone, Serialize)]
 pub struct ProjectContext {
     pub worktrees: Vec<WorktreeContext>,
     /// Whether any worktree has a rules_file. Provided as a field because handlebars can't do this.
@@ -71,14 +71,14 @@ pub struct UserRulesContext {
     pub contents: String,
 }
 
-#[derive(Debug, Clone, Serialize)]
+#[derive(Debug, Clone, Eq, PartialEq, Serialize)]
 pub struct WorktreeContext {
     pub root_name: String,
     pub abs_path: Arc<Path>,
     pub rules_file: Option<RulesFileContext>,
 }
 
-#[derive(Debug, Clone, Serialize)]
+#[derive(Debug, Clone, Eq, PartialEq, Serialize)]
 pub struct RulesFileContext {
     pub path_in_worktree: Arc<Path>,
     pub text: String,