Refactor text utility classes to Tailwind CSS (#36703)

Replace Fomantic/custom CSS text utility classes with their Tailwind
equivalents:

- `.text.<color>` compound classes → `tw-text-<color>` classes
- `.text.small` (`font-size: 0.75em`) → `tw-text-xs` (11px)
- `.text.truncate` (`overflow-x: hidden; text-overflow: ellipsis;
white-space: nowrap; display: inline-block`) → `tw-inline-block
tw-truncate`

Remove the now-unused CSS rules from `base.css` and `dashboard.css`.

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

templates/package/content/maven.tmpl

@@ -65,7 +65,7 @@
 						<i class="icon">{{svg "octicon-package-dependencies" 16 ""}}</i>
 						<div class="content">
 							<div class="header">{{.GroupID}}:{{.ArtifactID}}</div>
-							<div class="description text small">{{.Version}}</div>
+							<div class="description tw-text-xs">{{.Version}}</div>
 						</div>
 					</div>
 				{{end}}