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`.

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

templates/shared/repo/list.tmpl

@@ -12,9 +12,9 @@
 				<div class="flex-item-header">
 					<div class="flex-item-title">
 						{{if and $.ShowRepoOwnerOnList .Owner}}
-						<a class="text primary name" href="{{.Owner.HomeLink}}">{{.Owner.Name}}</a>/
+						<a class="tw-text-primary name" href="{{.Owner.HomeLink}}">{{.Owner.Name}}</a>/
 						{{end}}
-						<a class="text primary name" href="{{.Link}}">{{.Name}}</a>
+						<a class="tw-text-primary name" href="{{.Link}}">{{.Name}}</a>
 						<span class="label-list">
 							{{if .IsArchived}}
 								<span class="ui basic label">{{ctx.Locale.Tr "repo.desc.archived"}}</span>