feat: add more resource pack info

Adds pack format id and description to ResourcePack, that'll be parsed
from pack.mcmeta.

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/minecraft/mod/ResourcePack.h

@@ -2,12 +2,47 @@
 
 #include "Resource.h"
 
+#include <QMutex>
+
+class Version;
+
+/* TODO:
+ *
+ * Store pack.png
+ * Store localized descriptions
+ * */
+
 class ResourcePack : public Resource {
     Q_OBJECT
-    public:
+   public:
     using Ptr = shared_qobject_ptr<Resource>;
 
     ResourcePack(QObject* parent = nullptr) : Resource(parent) {}
     ResourcePack(QFileInfo file_info) : Resource(file_info) {}
 
+    /** Gets the numerical ID of the pack format. */
+    [[nodiscard]] int packFormat() const { return m_pack_format; }
+    /** Gets, respectively, the lower and upper versions supported by the set pack format. */
+    [[nodiscard]] std::pair<Version, Version> compatibleVersions() const;
+
+    /** Gets the description of the resource pack. */
+    [[nodiscard]] QString description() const { return m_description; }
+
+    /** Thread-safe. */
+    void setPackFormat(int new_format_id);
+
+    /** Thread-safe. */
+    void setDescription(QString new_description);
+
+   protected:
+    mutable QMutex m_data_lock;
+
+    /* The 'version' of a resource pack, as defined in the pack.mcmeta file.
+     * See https://minecraft.fandom.com/wiki/Tutorials/Creating_a_resource_pack#Formatting_pack.mcmeta
+     */
+    int m_pack_format = 0;
+
+    /** The resource pack's description, as defined in the pack.mcmeta file.
+     */
+    QString m_description;
 };