Add icons for Bitbucket, Codeberg, Forgejo, Gitea, and GitLab remotes (#57500)

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [ ] ~Unsafe blocks (if any) have justifying comments~ (N/A)
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Improves #44738 by including icons for more non-GitHub remotes instead
of a generic link icon. The SVG icons I added in `assets/icons` are
sourced from [simpleicons.org](https://simpleicons.org) as placeholders.
They most definitely aren't in Zed's style and need design team input.

Previews from History tab in Git panel (clicking on a commit in git
graph also shows matched icons):


![Bitbucket](https://github.com/user-attachments/assets/f6397716-8ac7-42f2-ba6d-7f2564cce19e)


![Codeberg](https://github.com/user-attachments/assets/d4c40d93-2cde-498d-8205-02c7dc495498)


![Forgejo](https://github.com/user-attachments/assets/a11d3ccb-05e3-4af6-9b14-8a89b4390e7e)


![Gitea](https://github.com/user-attachments/assets/7e84701a-a8c4-4298-851b-472765ef05b8)


![GitLab](https://github.com/user-attachments/assets/fb798f67-79f1-4937-add0-c3d636854182)

Release Notes:

- Added icons for Bitbucket, Codeberg, Forgejo, Gitea, and GitLab remote
providers.

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

crates/git_ui/src/commit_view.rs

@@ -1205,10 +1205,7 @@ impl Render for CommitViewToolbar {
                         }),
                 )
                 .children(remote_info.map(|(provider_name, url)| {
-                    let icon = match provider_name.as_str() {
-                        "GitHub" => IconName::Github,
-                        _ => IconName::Link,
-                    };
+                    let icon = crate::get_provider_icon(provider_name.as_str());
 
                     IconButton::new("view_on_provider", icon)
                         .icon_size(IconSize::Small)