Rename project to SIMtrace Analyser (v2.0.0)

- move the analysis server out of simtrace2_pysniff into simtrace_analyser;
  simtrace2_pysniff stays as the simtrace2-sniff replacement capture utility
- new server CLI: simtrace-analyser-server; python -m simtrace_analyser
  (simtrace2-pysniff-server and python -m simtrace2_pysniff.server dropped)
- simtrace2_pysniff lazy-imports hardware symbols, so the server no longer
  pulls PyUSB at startup; the GSMTAP/PCAP codecs work without libusb
- version 2.0.0 everywhere (was 1.22.21); PWA SW cache simtrace-analyser-v54
- frontend: server name, clone URL and i18n strings updated; vendored-parser
  reference otaman -> SIMple
- README/README_RUS reworked product-first (analyser first, utility second)
- DB dir ~/.simtrace-analyser, /api status payload and hosted PWA unchanged

simtrace2_pysniff/__init__.py

@@ -1,12 +1,11 @@
-"""simtrace2-pysniff — Python replacement for simtrace2-sniff."""
+"""simtrace2-pysniff — Python replacement for simtrace2-sniff.
 
-from .device import SniffSession, DeviceDisconnected, find_sniffer_device
-from .protocol import parse_message, SniffMessage
-from .gsmtap import GsmtapSender, GsmtapReceiver
-from .pcap import PcapWriter
-from .dump import FileDumper, format_message
+Capture utility bundled with SIMtrace Analyser.  Hardware access (PyUSB) is
+imported lazily, so the GSMTAP/PCAP codec modules can be used without libusb.
+"""
+
+from simtrace_analyser.version import __version__
 
-__version__ = '1.22.21'
 __all__ = [
     'SniffSession',
     'DeviceDisconnected',
@@ -20,3 +19,28 @@ __all__ = [
     'format_message',
     '__version__',
 ]
+
+_LAZY_IMPORTS = {
+    'SniffSession': ('.device', 'SniffSession'),
+    'DeviceDisconnected': ('.device', 'DeviceDisconnected'),
+    'find_sniffer_device': ('.device', 'find_sniffer_device'),
+    'parse_message': ('.protocol', 'parse_message'),
+    'SniffMessage': ('.protocol', 'SniffMessage'),
+    'GsmtapSender': ('.gsmtap', 'GsmtapSender'),
+    'GsmtapReceiver': ('.gsmtap', 'GsmtapReceiver'),
+    'PcapWriter': ('.pcap', 'PcapWriter'),
+    'FileDumper': ('.dump', 'FileDumper'),
+    'format_message': ('.dump', 'format_message'),
+}
+
+
+def __getattr__(name):
+    """Import utility symbols on first use (PEP 562)."""
+    try:
+        module_name, attr = _LAZY_IMPORTS[name]
+    except KeyError:
+        raise AttributeError(f'module {__name__!r} has no attribute {name!r}') from None
+    from importlib import import_module
+    value = getattr(import_module(module_name, __name__), attr)
+    globals()[name] = value
+    return value