Add a Compound hook. (#3979)

* Rename AppHooksProtocol.configure() to .setUp().

* Add a CompoundHook.

ElementX/Sources/AppHooks/AppHooks.swift

@@ -14,6 +14,11 @@ class AppHooks: AppHooksProtocol {
         appSettingsHook = hook
     }
     
+    private(set) var compoundHook: CompoundHookProtocol = DefaultCompoundHook()
+    func registerCompoundHook(_ hook: CompoundHookProtocol) {
+        compoundHook = hook
+    }
+    
     private(set) var bugReportHook: BugReportHookProtocol = DefaultBugReportHook()
     func registerBugReportHook(_ hook: BugReportHookProtocol) {
         bugReportHook = hook
@@ -32,9 +37,9 @@ class AppHooks: AppHooksProtocol {
 }
 
 protocol AppHooksProtocol {
-    func configure()
+    func setUp()
 }
 
 extension AppHooksProtocol {
-    func configure() { }
+    func setUp() { }
 }

ElementX/Sources/AppHooks/Hooks/CompoundHook.swift

@@ -0,0 +1,16 @@
+//
+// 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
+
+protocol CompoundHookProtocol {
+    func override(colors: CompoundColors, uiColors: CompoundUIColors)
+}
+
+struct DefaultCompoundHook: CompoundHookProtocol {
+    func override(colors: CompoundColors, uiColors: CompoundUIColors) { }
+}