feat(orgs): Add search bar for organization members tab page (#37347)

Resolve #37072 

<img width="1312" height="186" alt="image"
src="https://github.com/user-attachments/assets/3ca9eddb-9230-4b0d-992f-5b19e475e267"
/>

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Signed-off-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: bircni <bircni@icloud.com>

templates/org/member/members.tmpl

@@ -11,6 +11,17 @@
 			</div>
 			<div class="divider"></div>
 		{{end}}
+		<div class="ui small secondary filter menu">
+			<form id="org-member-search-form" class="ui form ignore-dirty tw-flex-1 tw-flex tw-items-center tw-gap-x-2">
+				<div class="ui small fluid action input tw-flex-1">
+					{{template "shared/search/input" dict "Value" .Keyword "Placeholder" (ctx.Locale.Tr "search.user_kind")}}
+					{{template "shared/search/button"}}
+				</div>
+			</form>
+			<div class="item tw-text-text-light">
+				{{ctx.Locale.Tr "org.members"}}: {{CountFmt .MembersShown}} / {{CountFmt .MembersTotal}}
+			</div>
+		</div>
 		<div class="flex-divided-list items-with-main">
 			{{range .Members}}
 				{{$isPublic := index $.MembersIsPublicMember .ID}}
@@ -67,6 +78,12 @@
 						{{end}}
 					</div>
 				</div>
+			{{else}}
+				<div class="flex-item">
+					<div class="flex-item-main">
+						{{ctx.Locale.Tr "search.no_results"}}
+					</div>
+				</div>
 			{{end}}
 		</div>
 		{{template "base/paginate" .}}