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/repo/settings/webhook/base_list.tmpl

@@ -12,12 +12,12 @@
 		<div class="item"><span>{{.Description}}</span></div>
 		{{range .Webhooks}}
 			<div class="item">
-				<span class="text {{if eq .LastStatus 1}}green{{else if eq .LastStatus 2}}red{{else}}grey{{end}}">{{svg "octicon-dot-fill" 22}}</span>
+				<span class="{{if eq .LastStatus 1}}tw-text-green{{else if eq .LastStatus 2}}tw-text-red{{else}}tw-text-text-light{{end}}">{{svg "octicon-dot-fill" 22}}</span>
 				<div class="gt-ellipsis tw-flex-1">
 					<a title="{{.URL}}" href="{{$.BaseLink}}/{{.ID}}">{{.URL}}</a>
 				</div>
 				<a class="muted tw-p-2" href="{{$.BaseLink}}/{{.ID}}">{{svg "octicon-pencil"}}</a>
-				<a class="text red tw-p-2 link-action"
+				<a class="tw-text-red tw-p-2 link-action"
 					data-url="{{$.Link}}/delete?id={{.ID}}"
 					data-modal-confirm="{{ctx.Locale.Tr "repo.settings.webhook_deletion_desc"}}"
 				>{{svg "octicon-trash"}}</a>