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/shared/view.tmpl

@@ -76,7 +76,7 @@
 			{{range .PackageDescriptor.Files}}
 			<div class="item">
 				<a href="{{$packageVersionLink}}/files/{{.File.ID}}">{{.File.Name}}</a>
-				<span class="text small tw-whitespace-nowrap">{{FileSize .Blob.Size}}</span>
+				<span class="tw-text-xs tw-whitespace-nowrap">{{FileSize .Blob.Size}}</span>
 			</div>
 			{{end}}
 		</div>
@@ -88,7 +88,7 @@
 			{{range .LatestVersions}}
 			<div class="item tw-flex">
 				<a class="tw-flex-1 gt-ellipsis" title="{{.Version}}" href="{{$.PackageDescriptor.PackageWebLink}}/{{PathEscape .LowerVersion}}">{{.Version}}</a>
-				<span class="text small">{{DateUtils.AbsoluteShort .CreatedUnix}}</span>
+				<span class="tw-text-xs">{{DateUtils.AbsoluteShort .CreatedUnix}}</span>
 			</div>
 			{{end}}
 		</div>