Prepare for release candidate v1.0.0-rc.1

[hoangtungdinh]

Description

This PR is to prepare for the release candidate v1.0.0-rc.1.

Main changes

1. Add release disclaimer
2. Bumb version to v1.0.0-rc.1
3. Remove the optional argument build_date when registering checker bundle.
4. Add documentation about how to implement new checkers.
5. Add quotation to example windows manifest to handle space (see Files in directory containing a whitespace don't work when calling ResultPooling, no end result and reporting qc-framework#189)

How was the PR tested?

1. Unit-test
2. Manually check a xqar file. The build date and the version are updated correctly.
3. Render the documentation locally.

Notes

This version still depends on the develop branch of asam-qc-baselib. When asam-qc-baselib has an official tag for v1.0.0-rc.1, the dependency will be updated.

[patrickpa]

Thanks @hoangtungdinh