feat(checker): examples() and spec_files() carry the specification's files

A consumer of the checker crate needs no path into this repository.

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

target/debug/build/proc-macro2-ef41e94ab0f532d9/invoked.timestamp

@@ -0,0 +1 @@
+This file has an mtime of when this was started.

target/debug/build/proc-macro2-ef41e94ab0f532d9/output

@@ -0,0 +1,23 @@
+cargo:rustc-check-cfg=cfg(fuzzing)
+cargo:rustc-check-cfg=cfg(no_is_available)
+cargo:rustc-check-cfg=cfg(no_literal_byte_character)
+cargo:rustc-check-cfg=cfg(no_literal_c_string)
+cargo:rustc-check-cfg=cfg(no_source_text)
+cargo:rustc-check-cfg=cfg(proc_macro_span)
+cargo:rustc-check-cfg=cfg(proc_macro_span_file)
+cargo:rustc-check-cfg=cfg(proc_macro_span_location)
+cargo:rustc-check-cfg=cfg(procmacro2_backtrace)
+cargo:rustc-check-cfg=cfg(procmacro2_build_probe)
+cargo:rustc-check-cfg=cfg(procmacro2_nightly_testing)
+cargo:rustc-check-cfg=cfg(procmacro2_semver_exempt)
+cargo:rustc-check-cfg=cfg(randomize_layout)
+cargo:rustc-check-cfg=cfg(span_locations)
+cargo:rustc-check-cfg=cfg(super_unstable)
+cargo:rustc-check-cfg=cfg(wrap_proc_macro)
+cargo:rerun-if-changed=src/probe/proc_macro_span.rs
+cargo:rustc-cfg=wrap_proc_macro
+cargo:rerun-if-changed=src/probe/proc_macro_span_location.rs
+cargo:rustc-cfg=proc_macro_span_location
+cargo:rerun-if-changed=src/probe/proc_macro_span_file.rs
+cargo:rustc-cfg=proc_macro_span_file
+cargo:rerun-if-env-changed=RUSTC_BOOTSTRAP

target/debug/build/proc-macro2-ef41e94ab0f532d9/root-output

@@ -0,0 +1 @@
+/tmp/claude-1000/-home-swaits-Code-wanderbooks/dadefedb-8c25-4271-8f56-da5f226f635b/scratchpad/bookspec/target/debug/build/proc-macro2-ef41e94ab0f532d9/out