git: Unify commit popups (#38749)

Closes #26424
Supersedes #35328

Originally, `git::blame` uses its own `ParsedCommitMessage` as the
source for the commit information, including the PR section. This
changes unifies this with `git::repository` and `git_ui::git_panel` by
moving this and some other commit-related structs to `git::commit`
instead, and making both `git_ui::blame_ui` and `git_ui::git_panel` pull
their information from these structs.

Release notes :

- (Let's Git Together) Fixed the commit tooltip in the git panel not
showing information like avatars.

---------

Co-authored-by: Cole Miller <cole@zed.dev>
Co-authored-by: Zed Zippy <234243425+zed-zippy[bot]@users.noreply.github.com>

crates/git/src/commit.rs

@@ -1,7 +1,52 @@
-use crate::{Oid, status::StatusCode};
+use crate::{
+    BuildCommitPermalinkParams, GitHostingProviderRegistry, GitRemote, Oid, parse_git_remote_url,
+    status::StatusCode,
+};
 use anyhow::{Context as _, Result};
 use collections::HashMap;
-use std::path::Path;
+use gpui::SharedString;
+use std::{path::Path, sync::Arc};
+
+#[derive(Clone, Debug, Default)]
+pub struct ParsedCommitMessage {
+    pub message: SharedString,
+    pub permalink: Option<url::Url>,
+    pub pull_request: Option<crate::hosting_provider::PullRequest>,
+    pub remote: Option<GitRemote>,
+}
+
+impl ParsedCommitMessage {
+    pub fn parse(
+        sha: String,
+        message: String,
+        remote_url: Option<&str>,
+        provider_registry: Option<Arc<GitHostingProviderRegistry>>,
+    ) -> Self {
+        if let Some((hosting_provider, remote)) = provider_registry
+            .and_then(|reg| remote_url.and_then(|url| parse_git_remote_url(reg, url)))
+        {
+            let pull_request = hosting_provider.extract_pull_request(&remote, &message);
+            Self {
+                message: message.into(),
+                permalink: Some(
+                    hosting_provider
+                        .build_commit_permalink(&remote, BuildCommitPermalinkParams { sha: &sha }),
+                ),
+                pull_request,
+                remote: Some(GitRemote {
+                    host: hosting_provider,
+                    owner: remote.owner.into(),
+                    repo: remote.repo.into(),
+                }),
+            }
+        } else {
+            Self {
+                message: message.into(),
+                ..Default::default()
+            }
+        }
+    }
+}
 
 pub async fn get_messages(working_directory: &Path, shas: &[Oid]) -> Result<HashMap<Oid, String>> {
     if shas.is_empty() {