User verification state indicators (#3793)

* Introduce a `UserIdentityProxy` and have it combine upstream methods into an easy to digest  `UserIdentityVerificationState`. Use it in a dedicated `VerificationBadge` UI component

* Show a DMs counterpart verification state in the room header

* Show a warning on the room details `People` entry when there are identity verification state violations on any of the members.

* Show verification badges in the room member list

* Show a withdraw verification section on the room member details for users that have pinning violations.

* Remove the verification section from the profile screen as there's no reliable way to keep it up to date
- the underlying Rust SDK Olm Machine can be rebuilt without notice which would break any existing user identity change streams.

* Update preview test snapshots

ElementX/Sources/Other/SwiftUI/VerificationBadge.swift

@@ -0,0 +1,37 @@
+//
+// Copyright 2025 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Compound
+import SwiftUI
+
+struct VerificationBadge: View {
+    let verificationState: UserIdentityVerificationState
+    
+    var body: some View {
+        switch verificationState {
+        case .verified:
+            CompoundIcon(\.verified, size: .small, relativeTo: .compound.bodyMD)
+                .foregroundStyle(.compound.iconSuccessPrimary)
+        case .verificationViolation:
+            CompoundIcon(\.infoSolid, size: .small, relativeTo: .compound.bodyMD)
+                .foregroundStyle(.compound.iconCriticalPrimary)
+        case .notVerified:
+            EmptyView()
+        }
+    }
+}
+
+struct VerificationBadge_Previews: PreviewProvider, TestablePreview {
+    static var previews: some View {
+        VStack(spacing: 16.0) {
+            VerificationBadge(verificationState: .notVerified)
+            VerificationBadge(verificationState: .verificationViolation)
+            VerificationBadge(verificationState: .verified)
+        }
+        .previewLayout(.sizeThatFits)
+    }
+}