build and upload executables created by PyInstaller

- create release on tag push
- build executables by PyInstaller:
    - extract_otp_secrets_linux_x86_64 (glibc 2.28)
    - extract_otp_secrets_win_x86_64.exe
    - extract_otp_secrets_macos_x86_64 (untested)
- add --version
- build linux executable in docker container
- update README
    - add TOC
    - improve badges
    - add PyInstaller section
- docker
    - build BASE_IMAGE as ARG
    - copy only required files to image
    - add .alias
- build.sh
    - fix clean
    - fix generate results
    - generate TOC

tests/extract_otp_secrets_test.py

@@ -509,7 +509,7 @@ def test_extract_verbose(verbose_level: str, color: str, capsys: pytest.CaptureF
 
 
 def normalize_verbose_text(text: str, relaxed: bool) -> str:
-    normalized = re.sub('^.+ version: .+$', '', text, flags=re.MULTILINE | re.IGNORECASE)
+    normalized = re.sub('^.*version: .+$', '', text, flags=re.MULTILINE | re.IGNORECASE)
     if not qreader_available:
         normalized = normalized \
             .replace('QReader installed: True', 'QReader installed: False') \
@@ -549,6 +549,20 @@ def test_extract_help(capsys: pytest.CaptureFixture[str]) -> None:
     assert e.value.code == 0
 
 
+def test_extract_version(capsys: pytest.CaptureFixture[str]) -> None:
+    with pytest.raises(SystemExit) as e:
+        # Act
+        extract_otp_secrets.main(['--version'])
+
+    # Assert
+    captured = capsys.readouterr()
+
+    assert captured.out.startswith('extract_otp_secrets ')
+    assert captured.err == ''
+    assert e.type == SystemExit
+    assert e.value.code == 0
+
+
 def test_extract_no_arguments(capsys: pytest.CaptureFixture[str], mocker: MockerFixture) -> None:
     if qreader_available:
         # Arrange