* feat: add loader APIs to load specs from a list of yaml docs
The change introduces a loader package that will contain loader
public APIs. The aim of these APIs will be to, given any source of
troubleshoot specs, the loaders will fetch the specs and parse out
all troubleshoot objects that can be extracted.
* Some refactoring
* Some more changes
* More changes caught when testing vendor portal
* Add tests and rename Troubleshoot kinds struct
* Additional test
* Handle ConfigMap and Secrets with multiple specs in them
* Fix failing test
* Revert multidoc split implementation
* Fix merge conflict
* Change LoadFromXXX functions to a single LoadSpecs function
Allow collecting of CPU and memory diagnostics when running troubleshoot CLI applications using --memprofile and --cpuprofile flags. These flags accept file paths if where to store the collected runtime data
