reorganize signed_core into method-based APIs

crates/workspace/src/views/pull_requests/new.rs

@@ -21,7 +21,7 @@ use gpui_component::{
     v_virtual_list,
 };
 use nostr::prelude::*;
-use signed_core::{Announcement, RepoAddr, fork_candidates};
+use signed_core::{Announcement, RepoAddr};
 use signed_git::{
     delete_refs_with_prefix, fetch_repo_refs, fork_namespace, merge_base, refs_with_prefix,
     worktree_commit_range_commits, worktree_commit_range_diff,
@@ -512,7 +512,7 @@ impl NewPullRequestView {
         };
         let user = Backend::global(cx).read(cx).current_user();
         let announcements = RepoListStore::global(cx).read(cx).announcements.clone();
-        fork_candidates(&announcements, &base, euc.as_deref(), user)
+        Announcement::forks_in(&announcements, &base, euc.as_deref(), user)
             .into_iter()
             .cloned()
             .collect()