Add avatar support for codeberg in git blame (#10991)

Release Notes:

- Added support for avatars in git blame for repositories hosted on
codeberg

<img width="1144" alt="Screenshot 2024-04-25 at 16 45 22"
src="https://github.com/zed-industries/zed/assets/43210583/d44770d8-44ea-4c6b-a1c0-ac2d1d49408f">

Questions:
- Should we move git stuff like `Commit`, `Author`, etc outside of
hosting-specific files (I don't think so, as other hostings can have
different stuff)
- Should we also add support for self hosted forgejo instances or should
it be a different PR?

crates/util/src/github.rs

@@ -1,4 +1,4 @@
-use crate::http::HttpClient;
+use crate::{git_author::GitAuthor, http::HttpClient};
 use anyhow::{anyhow, bail, Context, Result};
 use futures::AsyncReadExt;
 use isahc::{config::Configurable, AsyncBody, Request};
@@ -49,19 +49,12 @@ struct User {
     pub avatar_url: String,
 }
 
-#[derive(Debug)]
-pub struct GitHubAuthor {
-    pub id: u64,
-    pub email: String,
-    pub avatar_url: String,
-}
-
 pub async fn fetch_github_commit_author(
     repo_owner: &str,
     repo: &str,
     commit: &str,
     client: &Arc<dyn HttpClient>,
-) -> Result<Option<GitHubAuthor>> {
+) -> Result<Option<GitAuthor>> {
     let url = format!("https://api.github.com/repos/{repo_owner}/{repo}/commits/{commit}");
 
     let mut request = Request::get(&url)
@@ -93,10 +86,8 @@ pub async fn fetch_github_commit_author(
     serde_json::from_str::<CommitDetails>(body_str)
         .map(|github_commit| {
             if let Some(author) = github_commit.author {
-                Some(GitHubAuthor {
-                    id: author.id,
+                Some(GitAuthor {
                     avatar_url: author.avatar_url,
-                    email: github_commit.commit.author.email,
                 })
             } else {
                 None