rename(547): the repo is FabledGrimoire, and no stray "scribe" is left

The forge repo is now bvandeusen/FabledGrimoire. The plugin marketplace default,
the install commands in the docs and plugin README, the CI requirements title and
the example repo URLs in comments and tests follow it. docs/development.md now
names the image the build actually publishes, fabledgrimoire.

Two test names still said "scribes_own"; they now say "grimoires_own".

What still says scribe does so on purpose:
- the backup reader's accepted archive names and prefix;
- the label every stored secret is sealed under;
- the notes on keeping an old install's database names;
- the old migrations.

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

tests/test_services_repo_bindings.py

@@ -6,18 +6,18 @@ from grimoire.services.repo_bindings import normalize_repo_key
 @pytest.mark.parametrize(
     "raw",
     [
-        "git@git.fabledsword.com:bvandeusen/fabledscribe.git",
-        "git@git.fabledsword.com:bvandeusen/FabledScribe.git",
-        "https://git.fabledsword.com/bvandeusen/fabledscribe.git",
-        "https://git.fabledsword.com/bvandeusen/fabledscribe",
-        "http://git.fabledsword.com/bvandeusen/fabledscribe.git",
-        "ssh://git@git.fabledsword.com:22/bvandeusen/fabledscribe.git",
-        "ssh://git@git.fabledsword.com/bvandeusen/fabledscribe",
-        "https://user:token@git.fabledsword.com/bvandeusen/fabledscribe.git",
+        "git@git.fabledsword.com:bvandeusen/fabledgrimoire.git",
+        "git@git.fabledsword.com:bvandeusen/FabledGrimoire.git",
+        "https://git.fabledsword.com/bvandeusen/fabledgrimoire.git",
+        "https://git.fabledsword.com/bvandeusen/fabledgrimoire",
+        "http://git.fabledsword.com/bvandeusen/fabledgrimoire.git",
+        "ssh://git@git.fabledsword.com:22/bvandeusen/fabledgrimoire.git",
+        "ssh://git@git.fabledsword.com/bvandeusen/fabledgrimoire",
+        "https://user:token@git.fabledsword.com/bvandeusen/fabledgrimoire.git",
     ],
 )
 def test_normalize_collapses_equivalent_remotes(raw):
-    assert normalize_repo_key(raw) == "git.fabledsword.com/bvandeusen/fabledscribe"
+    assert normalize_repo_key(raw) == "git.fabledsword.com/bvandeusen/fabledgrimoire"
 
 
 @pytest.mark.parametrize("raw", ["", "   ", None])