unload single component

## Description

if we have loaded multiple components, it would be nice to be able to unload a single component without resetting everything back to default and reloading just the ones we want

## Result

chalk configs loaded:
```
using aaa
using bbb
using ccc
```
to unload, something like `chalk unload ccc` and then the loaded configs would be like:
```
using aaa
using bbb
```

## Dependencies

none

Start by tracing the existing CLI handling for loading multiple components and how the current reset-and-reload behavior is implemented. Verify how a command such as `chalk unload ccc` should update the loaded configuration state, and consider the work done when `aaa` and `bbb` remain loaded while `ccc` is removed.

Written by the indexing model from the issue text.