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/actions/list.tmpl

@@ -14,7 +14,7 @@
 							<span class="gt-ellipsis">{{.Entry.Name}}</span>
 
 							{{if .ErrMsg}}
-								<span class="flex-text-inline" data-tooltip-content="{{.ErrMsg}}">{{svg "octicon-alert" 16 "text red"}}</span>
+								<span class="flex-text-inline" data-tooltip-content="{{.ErrMsg}}">{{svg "octicon-alert" 16 "tw-text-red"}}</span>
 							{{end}}
 
 							{{if $.ActionsConfig.IsWorkflowDisabled .Entry.Name}}