"juice config view" command

Currently, the cli command \`juice config list \<filename\>\` loads the active unmerged configurations. As an extension to this, it would be extremely useful to have it support loading the full active configuration as a debugging tool. **Proposal:** Add a `juice config view <configurable-import-path>` command that displays the full active configuration in toml format. This would then load the full config using the `Configurable.load()` function. The `Configurable.load()` merges and validates the configuration from multiple files. The proposed API should display the full config in toml format, and also lists the config files from which they were merged. When the API fails to load due to validation error, a clear error message should be displayed pointing to the incorrectly formatted/rendered toml file

issue