rename(547): what people read says Grimoire

Step 1 of the Scribe -> Grimoire rename: every capitalised "Scribe" in prose
becomes "Grimoire" ("Fabled Scribe" -> "Fabled Grimoire") across the UI,
the PWA manifest and page title, the MCP instructions and tool docstrings,
hook and skill text, docs and README, with the tests that assert on that
prose moving with it. Old migrations keep their wording.

Identifiers are untouched here: the package, plugin name, MCP server key,
hook file names, env vars, the .scribe marker and FabledScribe repo/image
names move in steps 2 and 3, along with prose that quotes them.

The sweep matched "Scribe" only as a whole word, so describe/subscribe and
friends are untouched. The longer name took the MCP instructions one
character over their 1,600 budget; two phrases are shortened to fit.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/conftest.py

@@ -107,7 +107,7 @@ def _no_reply_shape_log():
     """Stub the reply-shape delivery row.
 
     Autouse for _no_system_labels' reason: every turn's retrieval, every
-    moment request and every Scribe tool that reaches a shaped moment writes
+    moment request and every Grimoire tool that reaches a shaped moment writes
     one AppLog row, and those paths are tested without a database.
     tests/test_reply_shapes.py binds the real function at import time,
     before this patch runs.