Migrate over to using pyosmocom

We're creating a 'pyosmocom' pypi module which contains a number of core
Osmocom libraries / interfaces that are not specific to SIM card stuff
contained here.

The main modules moved in this initial step are pySim.tlv, pySim.utils
and pySim.construct. utils is split, not all of the contents is
unrelated to SIM Cards.  The other two are moved completely.

Change-Id: I4b63e45bcb0c9ba2424dacf85e0222aee735f411

contrib/csv-encrypt-columns.py

@@ -22,8 +22,8 @@ import sys
 import csv
 import argparse
 from Cryptodome.Cipher import AES
+from osmocom.utils import h2b, b2h, Hexstr
 
-from pySim.utils import h2b, b2h, Hexstr
 from pySim.card_key_provider import CardKeyProviderCsv
 
 def dict_keys_to_upper(d: dict) -> dict:

contrib/es9p_client.py

@@ -28,10 +28,11 @@ from cryptography import x509
 from cryptography.hazmat.primitives.serialization import Encoding, PublicFormat
 from cryptography.hazmat.primitives.asymmetric import ec
 
+from osmocom.utils import h2b, b2h, swap_nibbles, is_hexstr
+from osmocom.tlv import bertlv_parse_one_rawtag, bertlv_return_one_rawtlv
+
 import pySim.esim.rsp as rsp
 from pySim.esim import es9p, PMO
-from pySim.utils import h2b, b2h, swap_nibbles, is_hexstr
-from pySim.utils import bertlv_parse_one_rawtag, bertlv_return_one_rawtlv
 from pySim.esim.x509_cert import CertAndPrivkey
 from pySim.esim.es8p import BoundProfilePackage
 

contrib/saip-tool.py

@@ -22,11 +22,11 @@ import logging
 import zipfile
 from pathlib import Path as PlPath
 from typing import List
+from osmocom.utils import h2b, b2h, swap_nibbles
 
 from pySim.esim.saip import *
 from pySim.esim.saip.validation import CheckBasicStructure
 from pySim import javacard
-from pySim.utils import h2b, b2h, swap_nibbles
 from pySim.pprint import HexBytesPrettyPrinter
 
 pp = HexBytesPrettyPrinter(indent=4,width=500)

contrib/unber.py

@@ -6,7 +6,8 @@
 import sys
 import argparse
 
-from pySim.utils import bertlv_parse_one, bertlv_encode_tag, b2h, h2b
+from osmocom.utils import b2h, h2b
+from osmocom.tlv import bertlv_parse_one, bertlv_encode_tag
 
 def process_one_level(content: bytes, indent: int):
     remainder = content