Add total size and total file count to file listing

[HeavyWombat]

Changes

Follow-up from #1702 to add the total size in bytes of all files and the total number of files to the file listing so that its immediately visible.

$ bundle --image ghcr.io/shipwright-io/sample-go/source-bundle:latest --target /tmp/workspace/source --show-listing
2024/11/04 11:58:04 Pulling image "ghcr.io/shipwright-io/sample-go/source-bundle:latest"
2024/11/04 11:58:05 Image content was extracted to /tmp/workspace/source
 -rw-r--r--  1  501  0  11.1K  LICENSE
 -rw-r--r--  1  501  0   249B  OWNERS
 -rw-r--r--  1  501  0   1.3K  README.md
 drwxr-xr-x  4  501  0   128B  docker-build
 -rw-r--r--  1  501  0   381B  docker-build/Dockerfile
 -rw-r--r--  1  501  0   972B  docker-build/main.go
 drwxr-xr-x  4  501  0   128B  docker-build-with-args
 -rw-r--r--  1  501  0   528B  docker-build-with-args/Dockerfile
 -rw-r--r--  1  501  0   972B  docker-build-with-args/main.go
 drwxr-xr-x  4  501  0   128B  source-build
 -rw-r--r--  1  501  0    35B  source-build/go.mod
 -rw-r--r--  1  501  0   972B  source-build/main.go
 drwxr-xr-x  4  501  0   128B  source-build-with-package
 -rw-r--r--  1  501  0    35B  source-build-with-package/go.mod
 drwxr-xr-x  3  501  0    96B  source-build-with-package/main-package
 -rw-r--r--  1  501  0   972B  source-build-with-package/main-package/main.go
──────────────────────────────────────────────────────────────────────────────
                          18K  16 files

Submitter Checklist

• Includes tests if functionality changed/was added
• Includes docs if changes are user-facing
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Release Notes

NONE

[SaschaSchwarze0]

/approve
/lgtm

[openshift-ci]

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