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/org/home.tmpl

@@ -49,7 +49,7 @@
 				{{if .NumMembers}}
 					<h4 class="ui top attached header tw-flex">
 						<strong class="tw-flex-1">{{ctx.Locale.Tr "org.members"}}</strong>
-						<a class="text grey tw-flex tw-items-center" href="{{.OrgLink}}/members"><span>{{.NumMembers}}</span> {{svg "octicon-chevron-right"}}</a>
+						<a class="tw-text-text-light tw-flex tw-items-center" href="{{.OrgLink}}/members"><span>{{.NumMembers}}</span> {{svg "octicon-chevron-right"}}</a>
 					</h4>
 					<div class="ui attached segment members">
 						{{$isMember := .IsOrganizationMember}}
@@ -63,13 +63,13 @@
 				{{if .IsOrganizationMember}}
 					<div class="ui top attached header tw-flex">
 						<strong class="tw-flex-1">{{ctx.Locale.Tr "org.teams"}}</strong>
-						<a class="text grey tw-flex tw-items-center" href="{{.OrgLink}}/teams"><span>{{.Org.NumTeams}}</span> {{svg "octicon-chevron-right"}}</a>
+						<a class="tw-text-text-light tw-flex tw-items-center" href="{{.OrgLink}}/teams"><span>{{.Org.NumTeams}}</span> {{svg "octicon-chevron-right"}}</a>
 					</div>
 					<div class="ui attached table segment teams">
 						{{range .Teams}}
 							<div class="item">
 								<a href="{{$.OrgLink}}/teams/{{.LowerName | PathEscape}}"><strong class="team-name">{{.Name}}</strong></a>
-								<p class="text grey">
+								<p class="tw-text-text-light">
 									<a class="muted" href="{{$.OrgLink}}/teams/{{.LowerName | PathEscape}}"><strong>{{.NumMembers}}</strong> {{ctx.Locale.Tr "org.lower_members"}}</a> ·
 									<a class="muted" href="{{$.OrgLink}}/teams/{{.LowerName | PathEscape}}/repositories"><strong>{{.NumRepos}}</strong> {{ctx.Locale.Tr "org.lower_repositories"}}</a>
 								</p>