Reorganize library code into libs/ (#3119)

* Reorganize files into libs/{dolphin,JSystem,PowerPC_EABI_Support,revolution,TRK_MINNOW_DOLPHIN}

* Update configure.py and project.py for new libs structure

* Refactor `#include <dolphin/x.h>` -> `<x.h>`

* Remove `__REVOLUTION_SDK__` forwards from dolphin

* Fix dolphin/ references in revolution

* Wrap `#include <dolphin.h>` in `!__REVOLUTION_SDK__`

* Always build TRK against dolphin headers

* Resolve revolution SDK header resolution issues

libs/JSystem/src/JAudio2/JAUBankTable.cpp

@@ -0,0 +1,12 @@
+#include "JSystem/JSystem.h" // IWYU pragma: keep
+
+#include "JSystem/JAudio2/JAUBankTable.h"
+
+void JAUBankTableDictionary::appendBankTable(JSULink<JAUBankTable>* bankTableList) {
+    append(bankTableList);
+}
+
+// Needed to make the inline function JAUBankTable::getBank appear in this TU
+static const JASBank* dummy(const JAUBankTable* table) {
+    return table->getBank(0);
+}