chore: reconcile Plan 1A branch with idfoto→relicario rename

Renames crate directories and sweeps identifiers so Plan 1B can reference
the post-rename names throughout.

- git mv crates/idfoto-{core,cli,wasm} → crates/relicario-{core,cli,wasm}
- sed sweep: idfoto_core/idfoto-core/IdfotoError/IDFOTO_IMAGE/.idfoto/ etc.
- All 128 relicario-core tests pass post-sweep

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Cargo.toml

@@ -1,7 +1,7 @@
 [workspace]
 resolver = "2"
 members = [
-    "crates/idfoto-core",
-    "crates/idfoto-cli",
-    "crates/idfoto-wasm",
+    "crates/relicario-core",
+    "crates/relicario-cli",
+    "crates/relicario-wasm",
 ]