fbt fixes & improvements (#1490)

* fbt: minimal USB flash mode; scripts: faster storage.py with larger chunks
* fbt: fixed creation of temporary file nodes confusing scons
* docs: removed refs to --with-updater
* fbt: removed splashscreen from minimal update package
* fbt: renamed dist arguments for consistency
* docs: fixed updater_debug target
* fbt: separate target for generating compilation_database.json without building the code.
* fbt: added `jflash` target for programming over JLink probe; refactored usb flashing targets
* fbt: building updater_app in unit_tests configuration
* fbt: fixed reset behavior after flashing with J-Link
* fbt: generating .map file for firmware binary & external apps
* fbt/core: moved library contents before apps code

Co-authored-by: あく <alleteam@gmail.com>

debug/fw.jflash

@@ -0,0 +1,90 @@
+  AppVersion = 76803
+  FileVersion = 2
+[GENERAL]
+  aATEModuleSel[24] = 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+  ConnectMode = 0
+  CurrentFile = "..\build\latest\firmware.bin"
+  DataFileSAddr = 0x08000000
+  GUIMode = 0
+  HostName = ""
+  TargetIF = 1
+  USBPort = 0
+  USBSerialNo = 0x00000000
+  UseATEModuleSelection = 0
+[JTAG]
+  IRLen = 0
+  MultipleTargets = 0
+  NumDevices = 0
+  Speed0 = 8000
+  Speed1 = 8000
+  TAP_Number = 0
+  UseAdaptive0 = 0
+  UseAdaptive1 = 0
+  UseMaxSpeed0 = 0
+  UseMaxSpeed1 = 0
+[CPU]
+  NumInitSteps = 2
+  InitStep0_Action = "Reset"
+  InitStep0_Value0 = 0x00000000
+  InitStep0_Value1 = 0x00000000
+  InitStep0_Comment = ""
+  InitStep1_Action = "Halt"
+  InitStep1_Value0 = 0xFFFFFFFF
+  InitStep1_Value1 = 0xFFFFFFFF
+  InitStep1_Comment = ""
+  NumExitSteps = 1
+  ExitStep0_Action = "Reset"
+  ExitStep0_Value0 = 0x00000005
+  ExitStep0_Value1 = 0x00000032
+  ExitStep0_Comment = ""
+  UseScriptFile = 0
+  ScriptFile = ""
+  UseRAM = 1
+  RAMAddr = 0x20000000
+  RAMSize = 0x00030000
+  CheckCoreID = 1
+  CoreID = 0x6BA02477
+  CoreIDMask = 0x0F000FFF
+  UseAutoSpeed = 0x00000001
+  ClockSpeed = 0x00000000
+  EndianMode = 0
+  ChipName = "ST STM32WB55RG"
+[FLASH]
+  aRangeSel[1] = 0-255
+  BankName = "Internal flash"
+  BankSelMode = 1
+  BaseAddr = 0x08000000
+  NumBanks = 1
+[PRODUCTION]
+  AutoPerformsDisconnect = 0
+  AutoPerformsErase = 1
+  AutoPerformsProgram = 1
+  AutoPerformsSecure = 0
+  AutoPerformsStartApp = 1
+  AutoPerformsUnsecure = 0
+  AutoPerformsVerify = 0
+  EnableFixedVTref = 0
+  EnableTargetPower = 0
+  EraseType = 1
+  FixedVTref = 0x00000CE4
+  MonitorVTref = 0
+  MonitorVTrefMax = 0x0000157C
+  MonitorVTrefMin = 0x000003E8
+  OverrideTimeouts = 0
+  ProgramSN = 0
+  SerialFile = ""
+  SNAddr = 0x00000000
+  SNInc = 0x00000001
+  SNLen = 0x00000004
+  SNListFile = ""
+  SNValue = 0x00000001
+  StartAppType = 1
+  TargetPowerDelay = 0x00000014
+  TimeoutErase = 0x00003A98
+  TimeoutProgram = 0x00002710
+  TimeoutVerify = 0x00002710
+  VerifyType = 1
+[PERFORMANCE]
+  DisableSkipBlankDataOnProgram = 0x00000000
+  PerfromBlankCheckPriorEraseChip = 0x00000001
+  PerfromBlankCheckPriorEraseSelectedSectors = 0x00000001