Move NeoChatConnection and NeoChatRoom to LibNeoChat

Move `NeoChatConnection` and `NeoChatRoom` to `LibNeoChat` along with any required dependencies.

src/libneochat/filetransferpseudojob.h

@@ -0,0 +1,62 @@
+// SPDX-FileCopyrightText: 2022 Tobias Fella <tobias.fella@kde.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <KJob>
+#include <QString>
+
+/**
+ * @class FileTransferPseudoJob
+ *
+ * A class inherited from KJob to track a file download.
+ *
+ * @sa KJob
+ */
+class FileTransferPseudoJob : public KJob
+{
+    Q_OBJECT
+public:
+    enum Operation {
+        Download,
+        Upload,
+    };
+    Q_ENUM(Operation)
+    FileTransferPseudoJob(Operation operation, const QString &srcDest, const QString &path);
+
+    /**
+     * @brief Set the current number of bytes transferred.
+     */
+    void fileTransferProgress(const QString &id, qint64 progress, qint64 total);
+
+    /**
+     * @brief Set the file transfer as complete.
+     */
+    void fileTransferCompleted(const QString &id, const QUrl &localFile);
+
+    /**
+     * @brief Set the file transfer as failed.
+     */
+    void fileTransferFailed(const QString &id, const QString &errorMessage = {});
+
+    /**
+     * @brief Set the file transfer as canceled.
+     */
+    void fileTransferCanceled(const QString &id);
+
+    /**
+     * @brief Start the file transfer.
+     */
+    void start() override;
+
+protected:
+    bool doKill() override;
+
+Q_SIGNALS:
+    void cancelRequested(const QString &id);
+
+private:
+    QString m_path;
+    QString m_eventId;
+    Operation m_operation;
+};