rename: slopsmith → feedBack, byron → got-feedBack (#537)

* Update GitHub repo references from feedback* to feedBack*

* 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

* rename: complete regen against current main + fix backward-compat alias

Regenerated the slopsmith->feedBack / byron->got-feedBack rename on top of
current main (3 commits had landed since the branch: #572/#554/#574),
resolving the four content conflicts in favour of main's newer content
(autoplay/auto-exit, accuracy-badge, Virtuoso re-home, feedpak badge).

Completion fixes on top of the mechanical rename:
- Re-apply rename to post-branch content the original rename never saw:
  window.slopsmith(.Tour) consumers in lessons.js / notifications.js /
  onboarding-tour.js, and the matching JS + python tests (autoplay_exit,
  progression_*, test_feedpak_extension FEEDBACK_* env vars). The test env
  vars now match server.py (which reads FEEDBACK_SYNC_STARTUP /
  FEEDBACK_SKIP_STARTUP_TASKS), so the sync-startup test exercises the real
  path again.
- Restore the window.slopsmith backward-compat alias dropped during conflict
  resolution, and move the bus aliases to AFTER the _feedBackExisting merge
  block so they reference the fully-assembled object (also fixes the
  loop_api.test.js API-surface regex, which the original PR latently broke).
- Drop the stray empty data/web_library.db (runtime DB lives in CONFIG_DIR)
  and gitignore it.
- Fix stale tone-source test: feed[dB]ack -> fee[dB]ack to match shipped
  source labels.

Verified locally (org CI billing-blocked): JS 819/819 pass; pytest 1669
passed / 1683 collected with 0 import errors; zero residual slopsmith/byron
except the two intentional window.slopsmith aliases.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* rename: implement advertised backward-compat + prune dead community plugins

Address gaps where PR #537's "Backward compatibility" section was advertised
but not implemented, and clean up the community plugin list.

Env vars (FEEDBACK_* canonical, legacy SLOPSMITH_* honoured):
- New lib/env_compat.py (getenv_compat / env_flag_compat) + tests. server.py
  (_env_flag + all FEEDBACK_* reads), diagnostics_hardware, gp2midi and
  tailwind_rebuild now resolve the legacy alias, so existing SLOPSMITH_UI /
  SLOPSMITH_PLUGINS_DIR / etc. deployments keep working.
- Fix the rename collapsing plugins/__init__.py and minigames/routes.py from
  `FEEDBACK_PLUGINS_DIR or SLOPSMITH_PLUGINS_DIR` into a redundant
  `FEEDBACK_ or FEEDBACK_` (the fallback was silently lost).

Storage (app.js update-channel):
- Read feedBack-update-channel, fall back to legacy slopsmith-update-channel,
  and clear the legacy key on write — so a user's update-channel preference
  survives the rename instead of resetting to "stable".

Community plugin list (README): the rename rewrote third-party repo URLs we
don't own. Probed every one; their owners never renamed, so:
- Restore the 13 live community plugins to their real slopsmith-* names.
- Prune 6 that are 404 to the public (topkoa splitscreen/stems, OmikronApex
  tuner, Jafz2001 nam-rig-builder, DeathlySin song-preview, Erikcb91 shuffle).
- Fix a pre-existing Guitar Theory clone-command typo (nam-tone -> guitar-theory).

Verified: env_compat 7/7, JS 819/819, pytest 1690 collected / 0 import errors,
rename-sensitive + startup suites green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: byrongamatos <xasiklas@gmail.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/benchmarks/note_detect_v2/build_benchmark.py

@@ -16,11 +16,11 @@ Goals vs v1:
   technique handling is the next algorithm focus, separate from
   measuring "do basic single notes + chords score correctly?"
 
-How to run inside the slopsmith container:
+How to run inside the feedBack container:
 
     docker cp docs/benchmarks/note_detect_v2/build_benchmark.py \\
-              slopsmith-web-1:/tmp/build_benchmark_v2.py
-    docker exec slopsmith-web-1 python /tmp/build_benchmark_v2.py \\
+              feedBack-web-1:/tmp/build_benchmark_v2.py
+    docker exec feedBack-web-1 python /tmp/build_benchmark_v2.py \\
               /app/static/sloppak_cache/note_detect_benchmark_v2.sloppak
 
 After regenerating, copy the zip output to the tracked path with the
@@ -375,7 +375,7 @@ def build(out_dir: Path):
 
     manifest = {
         'title': 'Note Detect Benchmark v2',
-        'artist': 'Slopsmith',
+        'artist': 'FeedBack',
         'album': 'Note Detection Benchmark',
         'year': 2026,
         'duration': round(end_t, 3),
@@ -392,7 +392,7 @@ def build(out_dir: Path):
             {'id': 'full', 'file': 'stems/full.ogg', 'default': True},
         ],
         'benchmark': {
-            'id': 'slopsmith-note-detect-benchmark',
+            'id': 'feedBack-note-detect-benchmark',
             'version': 2,
         },
     }
@@ -466,7 +466,7 @@ def _build_zip(src_dir: Path):
 
 
 def _benchmark_readme(duration_s):
-    return f"""# Slopsmith Note Detect Benchmark — v2
+    return f"""# FeedBack Note Detect Benchmark — v2
 
 A slower-paced companion to v1, focused on what players can actually
 land cleanly. Half-note spacing throughout (~1.33 s between events at