feat: /help command, atm.bat launcher, tzdata fix pentru Windows

- Telegram /h /help — listă comenzi în română
- atm.bat — pornire cu venv local automat, pip install la primul run
- tzdata adăugat în deps principale cu marker sys_platform==win32
- README: secțiuni dev, instalare Windows, flow-uri calibrare

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_commands.py

@@ -36,6 +36,14 @@ def test_parse_resume_force():
     assert cmd.value == 1
 
 
+def test_parse_help():
+    p = _make_poller()
+    assert p._parse_command("h") == Command(action="help")
+    assert p._parse_command("/h") == Command(action="help")
+    assert p._parse_command("help") == Command(action="help")
+    assert p._parse_command("/help") == Command(action="help")
+
+
 def test_parse_existing_commands_still_work():
     """Regression: adding pause/resume must not break stop/status/ss/interval."""
     p = _make_poller()