Enable integration test

Bump golang.org/x/net from 0.46.0 to 0.47.0

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.46.0 to 0.47.0.
- [Commits](golang/net@v0.46.0...v0.47.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-version: 0.47.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Rename the CLI package to "dossier-cli"

Add a Docker image for the CLI binary

Switch to Go 1.21 with its slices and maps packages