Various improvements for long file and commit names (#30374)

Fixes: https://github.com/go-gitea/gitea/issues/29438

This contains numerous enhancements for how large commit messages and
large filenames render. Another notable change is that the file path is
no longer cut off by backend at 30 chars, but rendered in full with
wrapping.

<img width="1329" alt="Screenshot 2024-04-09 at 21 53 57"
src="https://github.com/go-gitea/gitea/assets/115237/5ccbb3d6-643a-4f60-ba79-3572b36d5182">
<hr>
<img width="711" alt="Screenshot 2024-04-09 at 21 44 24"
src="https://github.com/go-gitea/gitea/assets/115237/6ffe8fbb-407c-4aa7-b591-3d80daea7d57">
<hr>
<img width="439" alt="Screenshot 2024-04-09 at 21 19 03"
src="https://github.com/go-gitea/gitea/assets/115237/1ec7f6e9-2fd8-4841-87eb-6ca02ab9cd61">
<hr>
<img width="444" alt="Screenshot 2024-04-09 at 21 18 52"
src="https://github.com/go-gitea/gitea/assets/115237/70931b9e-5841-477e-b3bc-98f8d2662964">

---------

Co-authored-by: Giteabot <teabot@gitea.io>

templates/repo/commit_page.tmpl

@@ -18,10 +18,10 @@
 			{{end}}
 		{{end}}
 		<div class="ui top attached header clearing segment tw-relative commit-header {{$class}}">
-			<div class="tw-flex tw-mb-4 tw-flex-wrap">
+			<div class="tw-flex tw-mb-4 tw-gap-1">
 				<h3 class="tw-mb-0 tw-flex-1"><span class="commit-summary" title="{{.Commit.Summary}}">{{RenderCommitMessage $.Context .Commit.Message ($.Repository.ComposeMetas ctx)}}</span>{{template "repo/commit_statuses" dict "Status" .CommitStatus "Statuses" .CommitStatuses}}</h3>
 				{{if not $.PageIsWiki}}
-					<div>
+					<div class="commit-header-buttons">
 						<a class="ui primary tiny button" href="{{.SourcePath}}">
 							{{ctx.Locale.Tr "repo.diff.browse_source"}}
 						</a>