Add CI/CD and implement the first two rules

[hoangtungdinh]

Description

This PR is ready for CCB's review.

This PR sets up the structure of the repository, creates CI/CD and implements the first two rules using the Python Base Library.

Main changes

1. The original implementation is moved to the original_implementation folder so that it can still be easily accessed and used as the reference implementation for the new rules. Towards the end of the project, the folder original_implementation will be removed.
   • Move old implementation to specific folder #3
2. Add CI/CD
   • Add CI/CD #5
3. Implement two rules: xml.valid_xml_document and xml.valid_schema
   • Add first version with new running checker #4
   • Add valid schema checker #6
   • Support schema v1.1.0 and v1.2.0 #7
   • Rename the first two rules #10

How was the PR tested?

1. Tests are documented in each PR above.

Notes

This PR will close the following issues:

• [XOSC] Implement Check for Rule 35 "xml.valid_xml_document" #1
• [XOSC] Implement Check for Rule 39 "xml.valid_schema" #2

[pmai]

Implementation looks good to me.

Other than that only the same question as for opendrive, i.e. why not just remove to original implementation?

[hoangtungdinh]

@pmai, the reason we keep the original implementation is that it is easier to access and use as a reference when implementing the rule, as we don't have to search the commit history or another branch to find the original implementation. However, I can see that it causes confusion. We will remove the original implementation in the next sprint.

[hoangtungdinh]

I am closing this PR as we now have #27 carrying all the commits from this PR.