GH-3392 dirty initial MSA support that shares logic with Mojang flows

Both act as the first step of AuthContext.

launcher/minecraft/auth/AccountData.h

@@ -0,0 +1,73 @@
+#pragma once
+#include <QString>
+#include <QByteArray>
+#include <QVector>
+#include <katabasis/Bits.h>
+#include <QJsonObject>
+
+struct Skin {
+    QString id;
+    QString url;
+    QString variant;
+
+    QByteArray data;
+};
+
+struct Cape {
+    QString id;
+    QString url;
+    QString alias;
+
+    QByteArray data;
+};
+
+struct MinecraftProfile {
+    QString id;
+    QString name;
+    Skin skin;
+    int currentCape = -1;
+    QVector<Cape> capes;
+    Katabasis::Validity validity = Katabasis::Validity::None;
+};
+
+enum class AccountType {
+    MSA,
+    Mojang
+};
+
+struct AccountData {
+    QJsonObject saveState() const;
+    bool resumeStateFromV2(QJsonObject data);
+    bool resumeStateFromV3(QJsonObject data);
+
+    //! userName for Mojang accounts, gamertag for MSA
+    QString accountDisplayString() const;
+
+    //! Only valid for Mojang accounts. MSA does not preserve this information
+    QString userName() const;
+
+    //! Only valid for Mojang accounts.
+    QString clientToken() const;
+    void setClientToken(QString clientToken);
+    void invalidateClientToken();
+    void generateClientTokenIfMissing();
+
+    //! Yggdrasil access token, as passed to the game.
+    QString accessToken() const;
+
+    QString profileId() const;
+    QString profileName() const;
+
+    AccountType type = AccountType::MSA;
+    bool legacy = false;
+    bool canMigrateToMSA = false;
+
+    Katabasis::Token msaToken;
+    Katabasis::Token userToken;
+    Katabasis::Token xboxApiToken;
+    Katabasis::Token mojangservicesToken;
+
+    Katabasis::Token yggdrasilToken;
+    MinecraftProfile minecraftProfile;
+    Katabasis::Validity validity_ = Katabasis::Validity::None;
+};