feat: add videodb media index with Docker stack

- Add videodb PHP/MySQL media collection manager (Blu-ray, DVD, CD)
- Dockerfile: PHP 8.1 + Apache with GD/mysqli/exif extensions
- docker-compose.yml: app on port 6761 + MySQL 8.0 with health checks
- docker-entrypoint.sh: auto-generates config.inc.php from env vars,
  waits for MySQL, initializes DB schema idempotently
- init-db.php: CLI schema installer using app's own prefix_query() logic
- Persistent volumes for DB, cache, and cover images

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

videodb/vendor/pear/console_getopt/README.rst

@@ -0,0 +1,26 @@
+*******************************************
+Console_Getopt - Command-line option parser
+*******************************************
+
+This is a PHP implementation of "getopt" supporting both short and long options.
+It helps parsing command line options in your PHP script.
+
+Homepage: http://pear.php.net/package/Console_Getopt
+
+.. image:: https://travis-ci.org/pear/Console_Getopt.svg?branch=master
+    :target: https://travis-ci.org/pear/Console_Getopt
+
+
+Alternatives
+============
+
+* Console_CommandLine__ (recommended)
+* Console_GetoptPlus__
+
+__ http://pear.php.net/package/Console_CommandLine
+__ http://pear.php.net/package/Console_GetoptPlus
+
+
+License
+=======
+BSD-2-Clause