Remove font-awesome and fomantic icon module (#24471)

Fixes https://github.com/go-gitea/gitea/issues/10410.
This PR removes around 120kB of CSS.

templates/repo/actions/list.tmpl

@@ -1,7 +1,6 @@
 {{template "base/head" .}}
 <div class="page-content repository">
 	{{template "repo/header" .}}
-
 	<div class="ui container">
 		<div class="ui stackable grid">
 			<div class="four wide column">
@@ -12,7 +11,7 @@
 						<a class="item{{if eq .Entry.Name $.CurWorkflow}} active{{end}}" href="{{$.Link}}?workflow={{.Entry.Name}}">{{.Entry.Name}}
 							{{if .ErrMsg}}
 								<span data-tooltip-content="{{.ErrMsg}}">
-									<i class="warning icon red"></i>
+									{{svg "octicon-alert" 16 "text red"}}
 								</span>
 							{{end}}
 						</a>

templates/repo/issue/labels/edit_delete_label.tmpl

@@ -57,7 +57,7 @@
 			{{.locale.Tr "cancel"}}
 		</button>
 		<button class="ui primary small approve button">
-			<i class="save icon"></i>
+			{{svg "fontawesome-save"}}
 			{{.locale.Tr "save"}}
 		</button>
 	</div>

templates/repo/issue/view_content/pull.tmpl

@@ -249,7 +249,7 @@
 						{{$.locale.Tr "repo.pulls.require_signed_wont_sign"}}
 					</div>
 					<div class="item">
-						<i class="icon unlock"></i>
+						<i class="icon icon-octicon">{{svg "octicon-unlock"}}</i>
 						{{$.locale.Tr (printf "repo.signing.wont_sign.%s" .WontSignReason)}}
 					</div>
 				{{end}}
@@ -274,12 +274,12 @@
 					{{end}}
 					{{if .WillSign}}
 						<div class="item">
-							<i class="icon lock green"></i>
+							<i class="icon icon-octicon">{{svg "octicon-lock" 16 "text green"}}</i>
 							{{$.locale.Tr "repo.signing.will_sign" .SigningKey}}
 						</div>
 					{{else if .IsSigned}}
 						<div class="item">
-							<i class="icon unlock"></i>
+							<i class="icon icon-octicon">{{svg "octicon-unlock"}}</i>
 							{{$.locale.Tr (printf "repo.signing.wont_sign.%s" .WontSignReason)}}
 						</div>
 					{{end}}