feat(slock): implement ext_session_lock_v1 backend

note: did not run lints or fully test yet

src/wayland/session_lock/manager.cpp

@@ -0,0 +1,22 @@
+#include "manager.hpp"
+
+#include <qdebug.h>
+#include <qlogging.h>
+#include <qwaylandclientextension.h>
+
+#include "lock.hpp"
+
+QSWaylandSessionLockManager::QSWaylandSessionLockManager()
+    : QWaylandClientExtensionTemplate<QSWaylandSessionLockManager>(1) {
+	this->initialize();
+}
+
+QSWaylandSessionLockManager::~QSWaylandSessionLockManager() { this->destroy(); }
+
+QSWaylandSessionLock* QSWaylandSessionLockManager::acquireLock() {
+	if (this->isLocked()) return nullptr;
+	this->active = new QSWaylandSessionLock(this, this->lock());
+	return this->active;
+}
+
+bool QSWaylandSessionLockManager::isLocked() const { return this->active != nullptr; }