Represent git statuses more faithfully (#23082)

First, parse the output of `git status --porcelain=v1` into a
representation that can handle the full "grammar" and doesn't lose
information.

Second, as part of pushing this throughout the codebase, expand the use
of the existing `GitSummary` type to all the places where status
propagation is in play (i.e., anywhere we're dealing with a mix of files
and directories), and get rid of the previous `GitSummary ->
GitFileStatus` conversion.

- [x] Synchronize new representation over collab
  - [x] Update zed.proto
  - [x] Update DB models
- [x] Update `GitSummary` and summarization for the new `FileStatus`
- [x] Fix all tests
  - [x] worktree
  - [x] collab
- [x] Clean up `FILE_*` constants
- [x] New collab tests to exercise syncing of complex statuses
- [x] Run it locally and make sure it looks good

Release Notes:

- N/A

---------

Co-authored-by: Mikayla <mikayla@zed.dev>
Co-authored-by: Conrad <conrad@zed.dev>

crates/outline_panel/src/outline_panel.rs

@@ -1982,7 +1982,7 @@ impl OutlinePanel {
         let is_expanded = !self
             .collapsed_entries
             .contains(&CollapsedEntry::Excerpt(excerpt.buffer_id, excerpt.id));
-        let color = entry_git_aware_label_color(None, false, is_active);
+        let color = entry_label_color(is_active);
         let icon = if has_outlines {
             FileIcons::get_chevron_icon(is_expanded, cx)
                 .map(|icon_path| Icon::from_path(icon_path).color(color).into_any_element())
@@ -2086,7 +2086,7 @@ impl OutlinePanel {
             }) => {
                 let name = self.entry_name(worktree_id, entry, cx);
                 let color =
-                    entry_git_aware_label_color(entry.git_status, entry.is_ignored, is_active);
+                    entry_git_aware_label_color(entry.git_summary, entry.is_ignored, is_active);
                 let icon = if settings.file_icons {
                     FileIcons::get_icon(&entry.path, cx)
                         .map(|icon_path| Icon::from_path(icon_path).color(color).into_any_element())
@@ -2114,7 +2114,7 @@ impl OutlinePanel {
                     directory.entry.id,
                 ));
                 let color = entry_git_aware_label_color(
-                    directory.entry.git_status,
+                    directory.entry.git_summary,
                     directory.entry.is_ignored,
                     is_active,
                 );
@@ -2210,7 +2210,8 @@ impl OutlinePanel {
             let git_status = folded_dir
                 .entries
                 .first()
-                .and_then(|entry| entry.git_status);
+                .map(|entry| entry.git_summary)
+                .unwrap_or_default();
             let color = entry_git_aware_label_color(git_status, is_ignored, is_active);
             let icon = if settings.folder_icons {
                 FileIcons::get_folder_icon(is_expanded, cx)
@@ -2556,7 +2557,10 @@ impl OutlinePanel {
                             match entry_id.and_then(|id| worktree.entry_for_id(id)).cloned() {
                                 Some(entry) => {
                                     let entry = GitEntry {
-                                        git_status: worktree.status_for_file(&entry.path),
+                                        git_summary: worktree
+                                            .status_for_file(&entry.path)
+                                            .map(|status| status.summary())
+                                            .unwrap_or_default(),
                                         entry,
                                     };
                                     let mut traversal = worktree