docs: the repository of its own: licences, CI, citations checked in form (P13 step 6)

spec/ and examples/ are CC BY 4.0, the code MIT OR Apache-2.0. The
verbatim-pin and rules.md-id checks need wanderbooks' vendored sources and
rules.md, so they move to wanderbooks; here a citation is checked in form.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HS8WZziDnyxunC23MUxrLp

Cargo.toml

@@ -1,6 +1,4 @@
-# bookspec's own workspace, inside the wanderbooks repository until the
-# specification and its harness are stable enough to move to their own
-# repository (P13 step 6, D-34).
+# bookspec: a formal accounting specification, its checker, runner and examples.
 [workspace]
 resolver = "2"
 members = ["checker", "runner", "gnucash"]
@@ -8,7 +6,7 @@ members = ["checker", "runner", "gnucash"]
 [workspace.package]
 edition = "2024"
 license = "MIT OR Apache-2.0"
-repository = "https://git.swaits.com/swaits/wanderbooks"
+repository = "https://github.com/swaits/bookspec"
 
 [workspace.lints.rust]
 missing_docs = "warn"