rename: slopsmith -> feedBack, byron -> got-feedBack

Renames across the entire codebase:
- slopsmith/Slopsmith/SLOPSMITH/SlopSmith -> feedBack/FeedBack/FEEDBACK/FeedBack
- byron/Byron/Byrongamatos -> got-feedBack/got-feedBack/got-feedBack
- /home/byron/ -> /opt/got-feedBack/
- byron@ougsoft.com -> hi@got-feedBack.org
- github.com/byrongamatos/ -> github.com/got-feedback/
- com.byron. -> com.got-feedback.
- SLOPSMITH_ env vars -> FEEDBACK_ with backward-compat fallback
- Protocol/storage strings migrated with read-old/write-new pattern
- window.slopsmith JS API -> window.feedBack (canonical) + backward-compat alias

Refs: #rename-slopsmith

lib/gp8_audio_sync.py

@@ -3,7 +3,7 @@ lib/gp8_audio_sync.py — Extract embedded audio and sync data from GP8 (.gp) fi
 
 Guitar Pro 8 can embed a backing track (OGG audio) into a .gp file alongside
 sync points that map bar positions to exact audio timestamps. This module
-extracts both, giving Slopsmith:
+extracts both, giving FeedBack:
 
   1. A real backing track audio file (OGG) — no MIDI synthesis needed
   2. A precise audio_offset (seconds) from the FramePadding value
@@ -45,7 +45,7 @@ import io
 from dataclasses import dataclass, field
 from pathlib import Path
 
-_log = logging.getLogger("slopsmith.lib.gp8_audio_sync")
+_log = logging.getLogger("feedBack.lib.gp8_audio_sync")
 
 # GP8 embeds the backing track under Content/Assets/ as OGG *or* one of
 # several other formats (MP3 is common — e.g. tracks rendered straight