Add support for title.db, and use title.db to augment TMD finding

Also added support for system title CIA building, and fixed various minor issues.
Also moved MakeMagic to Common.

src/common/common_funcs.h

@@ -78,3 +78,12 @@ bool CheckedMemcpy(void* dest, T& container, std::ptrdiff_t offset, std::size_t
     std::memcpy(dest, container.data() + offset, size);
     return true;
 }
+
+consteval u32 MakeMagic(char a, char b, char c, char d) {
+    return a | b << 8 | c << 16 | d << 24;
+}
+
+consteval u64 MakeMagic(char a, char b, char c, char d, char e, char f, char g, char h) {
+    return u64(a) | u64(b) << 8 | u64(c) << 16 | u64(d) << 24 | u64(e) << 32 | u64(f) << 40 |
+           u64(g) << 48 | u64(h) << 56;
+}