[FL-1443, FL-1289] Move assets compilation to separate Makefile. Add scripts folder. Add OTP flashing with DFU. (#531)

* Assets: move assets compilation to separate Makefile. Move all scripts to scripts folder. Add scripts ReadMe. Add precompiled assets.
* Split assets.py into separate entities. Option bytes for FL-1289 and checker/setter.
* Cli: explicitly initialize variable befor use in api_hal_vcp_rx_with_timeout
* Rename ob_check script to ob.

scripts/otp.py

@@ -0,0 +1,91 @@
+#!/usr/bin/env python3
+
+import logging
+import argparse
+import os
+import sys
+import re
+import struct
+import datetime
+
+
+class Main:
+    def __init__(self):
+        # command args
+        self.parser = argparse.ArgumentParser()
+        self.parser.add_argument("-d", "--debug", action="store_true", help="Debug")
+        self.subparsers = self.parser.add_subparsers(help="sub-command help")
+        self.parser_generate = self.subparsers.add_parser(
+            "generate", help="OTP HW version generator"
+        )
+        self.parser_generate.add_argument(
+            "--version", type=int, help="Version", required=True
+        )
+        self.parser_generate.add_argument(
+            "--firmware", type=int, help="Firmware", required=True
+        )
+        self.parser_generate.add_argument(
+            "--body", type=int, help="Body", required=True
+        )
+        self.parser_generate.add_argument(
+            "--connect", type=int, help="Connect", required=True
+        )
+        self.parser_generate.add_argument(
+            "--name", type=str, help="Name", required=True
+        )
+        self.parser_generate.add_argument("file", help="Output file")
+        self.parser_generate.set_defaults(func=self.generate)
+        # logging
+        self.logger = logging.getLogger()
+
+    def __call__(self):
+        self.args = self.parser.parse_args()
+        if "func" not in self.args:
+            self.parser.error("Choose something to do")
+        # configure log output
+        self.log_level = logging.DEBUG if self.args.debug else logging.INFO
+        self.logger.setLevel(self.log_level)
+        self.handler = logging.StreamHandler(sys.stdout)
+        self.handler.setLevel(self.log_level)
+        self.formatter = logging.Formatter("%(asctime)s [%(levelname)s] %(message)s")
+        self.handler.setFormatter(self.formatter)
+        self.logger.addHandler(self.handler)
+        # execute requested function
+        self.args.func()
+
+    def generate(self):
+        self.logger.debug(f"Generating OTP")
+
+        if self.args.name:
+            name = re.sub(
+                "[^a-zA-Z0-9.]", "", self.args.name
+            )  # Filter all special characters
+            name = list(
+                map(str, map(ord, name[0:8]))
+            )  # Strip to 8 chars and map to ascii codes
+            while len(name) < 8:
+                name.append("0")
+
+            n1, n2, n3, n4, n5, n6, n7, n8 = map(int, name)
+
+        data = struct.pack(
+            "<BBBBLBBBBBBBB",
+            self.args.version,
+            self.args.firmware,
+            self.args.body,
+            self.args.connect,
+            int(datetime.datetime.now().timestamp()),
+            n1,
+            n2,
+            n3,
+            n4,
+            n5,
+            n6,
+            n7,
+            n8,
+        )
+        open(self.args.file, "wb").write(data)
+
+
+if __name__ == "__main__":
+    Main()()