Rebrand project to PiSCSI (#1016)

* Rebrand project to PiSCSI
- rascsi ->piscsi
- rasctl -> scsictl
- rasdump -> scsidump
- ras* -> piscsi* (rasutil -> piscsi_util, etc.)

* Refined the formatting and wording of the app startup banner
* Kept some references to rascsi and rasctl where backwards compatibility is concerned
* Point to the new github repo URL

Co-authored-by: nucleogenic <nr@nucleogenic.com>
Co-authored-by: Uwe Seimet <Uwe.Seimet@seimet.de>

cpp/test/test_setup.cpp

@@ -1,6 +1,6 @@
 //---------------------------------------------------------------------------
 //
-// SCSI Target Emulator RaSCSI Reloaded
+// SCSI Target Emulator PiSCSI
 // for Raspberry Pi
 //
 // Copyright (C) 2022 Uwe Seimet
@@ -11,7 +11,7 @@
 
 #include "spdlog/spdlog.h"
 
-// Also used by the RascsiExecutor tests
+// Also used by the PiscsiExecutor tests
 bool enable_logging; //NOSONAR Must be global in order to be shared with the tests
 
 class Environment final : public ::testing::Environment