fix: Jasmine augmentation withContext and add Playgrounds for Jasmine, Jest & Mocha

[dprevost-LMI]

Lately, we broke expect-wdio integration with other products multiple times, since we rely solely on unit tests for testing, troubleshooting, and releases. Adding playgrounds will:

1. Help trouble-shooting existing problem since reproducibility will be easier to do
2. New feature will be easier to test all the way to wdio before releasing, and breaking something
3. Ensure that the lib is properly compiled and used
4. Provide better hands-on examples for Jasmine, Mocha, Jest and SoftAssertion examples.
5. Easier way to test TypeScript augmentations

Jasmine

1. Adjust Jasmine docs about its design & quirks
2. Fix Jasminejasmine-wdio-expect-async typing not exposed in package.json export
3. Fixes Jasmine withContext broken #1407 where expet().withContext() generating typing issue

[christian-bromann]

Can we not call the snapshot directory .tmp? Otherwise it seems confusing if the directory was suppose to be checked in.

Otherwise, this is awesome!

[dprevost-LMI]

Checking, I had used the default but I agree it is wierd, will do

[dprevost-LMI]

@christian-bromann ready again