Initial commit: OCI image mounting via containers-storage

slocker-lite validates an OCI Image Layout tar, imports its layers into
containers-storage's layer store in order, and mounts the assembled image
using fuse-overlayfs, printing the resulting merged path.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

subprojects/spdlog.wrap

@@ -0,0 +1,14 @@
+[wrap-file]
+directory = spdlog-1.17.0
+source_url = https://github.com/gabime/spdlog/archive/refs/tags/v1.17.0.tar.gz
+source_filename = spdlog-1.17.0.tar.gz
+source_hash = d8862955c6d74e5846b3f580b1605d2428b11d97a410d86e2fb13e857cd3a744
+source_fallback_url = https://wrapdb.mesonbuild.com/v2/spdlog_1.17.0-2/get_source/spdlog-1.17.0.tar.gz
+patch_filename = spdlog_1.17.0-2_patch.zip
+patch_url = https://wrapdb.mesonbuild.com/v2/spdlog_1.17.0-2/get_patch
+patch_fallback_url = https://github.com/mesonbuild/wrapdb/releases/download/spdlog_1.17.0-2/spdlog_1.17.0-2_patch.zip
+patch_hash = f5dd3aead18a790b5463f1af514eec63d06893d860966771375d77fd4d9e4acf
+wrapdb_version = 1.17.0-2
+
+[provide]
+dependency_names = spdlog