Article links fix + Packager & Metadata updates

[vv-monsalve]

@emmamarichal, @m4rc1e, this PR fixes some broken links to the "Article" section and updates the Packager and Metadata files to the latest changes introduced by the Packager. Key points to review:

• package.md - The new process for the packager. This is the file with the significant edits, as the .yaml file is no longer used.
• metadata.md - The source field info, as it is related to the packager. The changes on this file look huge, but was mainly formatting fixes. However, please pay attention to the subtle additions.

Please review it again and feel free to make further edits or fixes.

[vv-monsalve]

@m4rc1e I need to merge this PR to solve the broken link to the Article content. However, please take a look at the Packager and Metadata sections. Feel free to open either an Issue or a PR with adjustments or additions to those sections.