Space Settings: Leave Room (#4700)

* Implementation for all navigations inside the space settings aside the left space action

# Conflicts:
#	ElementX/Sources/FlowCoordinators/SpaceSettingsFlowCoordinator.swift

* refactored the leave space view to use its own view model

# Conflicts:
#	ElementX.xcodeproj/project.pbxproj

* implemented the leave space view model also in the settings screen, and corrected some tests

* reusing the details coordinator for the space settings screen

* leave space from settings implemented

* fix project

* minor pr fixes

* code improvements

ElementX/Sources/Screens/Spaces/LeaveSpace/LeaveSpaceModels.swift

@@ -0,0 +1,48 @@
+//
+// Copyright 2025 Element Creations Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+// Please see LICENSE files in the repository root for full details.
+//
+
+enum LeaveSpaceViewAction {
+    case confirmLeaveSpace
+    case deselectAll
+    case selectAll
+    case toggleRoom(roomID: String)
+    case rolesAndPermissions
+    case cancel
+}
+
+struct LeaveSpaceViewState: BindableState {
+    let spaceName: String
+    let canEditRolesAndPermissions: Bool
+    let leaveHandle: LeaveSpaceHandleProxy
+    
+    var title: String {
+        switch leaveHandle.mode {
+        case .lastSpaceAdmin: L10n.screenLeaveSpaceTitleLastAdmin(spaceName)
+        default: L10n.screenLeaveSpaceTitle(spaceName)
+        }
+    }
+    
+    var subtitle: String? {
+        switch leaveHandle.mode {
+        case .manyRooms: L10n.screenLeaveSpaceSubtitle
+        case .onlyAdminRooms: L10n.screenLeaveSpaceSubtitleOnlyLastAdmin
+        case .noRooms: nil
+        case .lastSpaceAdmin: L10n.screenLeaveSpaceSubtitleLastAdmin
+        }
+    }
+    
+    var confirmationTitle: String {
+        let selectedCount = leaveHandle.selectedCount
+        return selectedCount > 0 ? L10n.screenLeaveSpaceSubmit(selectedCount) : L10n.actionLeaveSpace
+    }
+}
+
+enum LeaveSpaceViewModelAction {
+    case didLeaveSpace
+    case presentRolesAndPermissions
+    case didCancel
+}