PasswordDetector extension (#1)

## Description

- added PasswordDetector extension;
- added compatibility with Python 3.8.x and above;

## Testing
- tested by @dnzbk - nzbget v23.0 on Windows 11 / macOS Ventura 
- tested by @phnzb - nzbget docker testing (23.1)

.github/workflows/release.yml

@@ -0,0 +1,13 @@
+name: release
+
+on:
+  push:
+    tags:
+    - "v*"
+
+jobs:
+  release:
+    uses: nzbgetcom/nzbget-extensions/.github/workflows/extension-release.yml@main
+    with:
+      release-file-list: PasswordDetector.py
+      release-file-name: passworddetector