Restructure: promote working_copy to repo root

Make the stable 'working copy' bot the canonical code at the repository
root so the install/deploy scripts operate against it again.

- Move working_copy/* to root (bot entrypoint is bot.py)
- Restore root-level install/ops scripts from c4fa88e (deploy.sh,
  install_main_bot.sh, status_report.*, conjurer.service, etc.)
- Fix deploy.sh: copy bot.py (was thin_client.py) and add the
  conanjurer_* modules; bump command count
- Remove side-by-side variant dirs (backup_old_docker, prototype_one,
  prototype_musician_one, musician_old, working_copy) and docker cruft
- Keep components as subdirs: conjurer_librarian, conjurer_musician,
  spotify_dl, yt_dlp, fonts, utils, docs

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

requirements_bot.txt

@@ -0,0 +1,20 @@
+setuptools
+discord
+yt_dlp
+spotify_dl
+spotipy
+openai
+eyed3
+numpy
+pdf2image
+PyPDF2
+requests
+spotipy
+tiktoken
+PyNaCl
+flask[async]
+PyMuPDF
+waitress
+assemblyai[extras]
+SpeechRecognition
+git+https://github.com/imayhaveborkedit/discord-ext-voice-recv