Fix image name parsing

[sjmiller609]

I was having an issue with "hypeman push" when run from remote server, which I wanted to use for testing the gpu related changes.

Note

Strengthens image/repo name handling and registry auth.

• Replace regex-based repo extraction with docker/distribution v2.Router() in oapi_auth.go to correctly parse /v2/{name}/... where name may contain slashes; update extractRepoFromPath accordingly
• Add comprehensive tests: URL-decoding behavior of oapi-codegen runtime, Chi routing with URL-encoded slashes, and repo extraction across manifests/blobs/uploads paths; expand auth tests to reject registry-scoped tokens and edge cases
• Update dependencies (docker/distribution, gorilla/mux, opencontainers/go-digest, google/uuid) to direct requirements

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[hiroTamada]

looks good - using docker/distribution's router to parse registry paths is a solid approach that handles nested repo names correctly. good test coverage.