feat(core&cli): Integrate HTML filter & Add article selection

[Qubik65536]

This PR adds the following features:

• On the core part:
  • Add the HTML filter functionality, so the HTML content from web page is filtered before being processed by the HTML to MD parser.
  • HTML filter rules for HTML parser is now retrieved from resources files. If no corresponding file is found, a default rule is used.
  • The template for translating articles is now retrieved from a resources file.
• On the CLI part:
  • Use the new article selector (with the HTML filter) for article selection method.

closes #6