Initial version: dlp.py orchestrates Discord export, link extraction and host-aware downloads

- dlphelper/discord.py: DCE docker export (JSON) + base64/plain URL extraction
  (extraction regex kept compatible with parts/grab.sh)
- dlphelper/gofile.py: GoFile client adapted from Lysagxra/GoFileDownloader's
  API scheme, but ONE guest account per run and per-file failure tracking
  instead of sys.exit - fixes the rate-limit death after ~6 downloads
- dlphelper/zero807.py: curl downloader with the UA+Referer contract 0807.st
  requires; .part files for resumable downloads
- dlphelper/state.py: state.json (resume/skip) + manifest.jsonl (torrent stage
  later) + failed_urls.txt
- tools/new_repo.py: Gitea repo helper reading ~/.git-credentials itself
- AGENTS.md with agent rules, README, offline extraction test

.gitignore

@@ -0,0 +1,20 @@
+# Python
+__pycache__/
+*.pyc
+.venv/
+*.egg-info/
+
+# Run outputs (if OUT_DIR points into the repo)
+thread/
+downloads/
+export.json
+export.html
+state.json
+state.json.tmp
+failed_urls.txt
+manifest.jsonl
+*.log
+
+# Never commit credentials
+*.token
+.env