[Room][UserList] Introduce style delegate (#6981)

* [Room] Additionally show a tab for friends and ignored users instead of just all online users.

Took 21 minutes


Took 12 minutes

* [Room][UserList] Introduce style delegate for user list
- Allow users to set a card name and parameters as their background banner
- Allow mods to white/blacklist cards
- Allow toggling back to the old display style

Took 7 minutes

Took 28 seconds

Took 2 minutes

Took 2 minutes

* Right checkstate.

Took 14 minutes


Took 2 minutes

* Utility for test.

Took 9 minutes

Took 8 seconds

Took 2 seconds

* Lint.

Took 10 minutes

* Algorithm for sql schema migration

Took 13 minutes

* Use {prefix}, bound card name, return errors.

Took 27 seconds

* Convert queue to while loop.

Took 19 seconds

* Hover popup.

Took 36 minutes

Took 1 minute

* More granular signals, popup for user info.

Took 25 minutes

Took 8 seconds

Took 16 minutes

---------

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

cockatrice/src/interface/widgets/server/user/user_avatar_provider.cpp

@@ -0,0 +1,48 @@
+#include "user_avatar_provider.h"
+
+#include <libcockatrice/network/client/abstract/abstract_client.h>
+#include <libcockatrice/protocol/pb/response_get_user_info.pb.h>
+#include <libcockatrice/protocol/pending_command.h>
+
+UserAvatarProvider::UserAvatarProvider(AbstractClient *client, QObject *parent) : QObject(parent), client(client)
+{
+}
+
+const QMap<QString, QPixmap> &UserAvatarProvider::cache() const
+{
+    return avatarCache;
+}
+
+void UserAvatarProvider::requestAvatar(const QString &userName)
+{
+    if (avatarCache.contains(userName) || pending.contains(userName)) {
+        return;
+    }
+
+    pending.insert(userName);
+
+    Command_GetUserInfo cmd;
+    cmd.set_user_name(userName.toStdString());
+
+    PendingCommand *pend = client->prepareSessionCommand(cmd);
+
+    connect(pend, &PendingCommand::finished, this, [this, userName](const Response &r) {
+        pending.remove(userName);
+
+        const auto &response = r.GetExtension(Response_GetUserInfo::ext);
+        const auto &user = response.user_info();
+        const std::string &bmp = user.avatar_bmp();
+
+        QPixmap avatar;
+        if (!bmp.empty() &&
+            avatar.loadFromData(reinterpret_cast<const uchar *>(bmp.data()), static_cast<uint>(bmp.size()))) {
+            avatarCache.insert(userName, avatar);
+        } else {
+            avatarCache.insert(userName, QPixmap());
+        }
+
+        emit avatarUpdated(userName);
+    });
+
+    client->sendCommand(pend);
+}