add basic support for title installing

sphaira/include/yati/source/base.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <vector>
+#include <switch.h>
+
+namespace sphaira::yati::source {
+
+struct Base {
+    virtual ~Base() = default;
+    // virtual Result Read(void* buf, s64 off, s64 size, u64* bytes_read) = 0;
+    virtual Result Read(void* buf, s64 off, s64 size, u64* bytes_read) = 0;
+
+    Result GetOpenResult() const {
+        return m_open_result;
+    }
+
+protected:
+    Result m_open_result{};
+};
+
+} // namespace sphaira::yati::source