User:Gryllida/Article/Create/SourceManager

Context: When creating or improving articles some sources are missing an author or publisher or date or are not filled in at all. Solutions like WP:reFill and RefToolbar exist and are nice however they do not touch the question of the source type such as whether it is a primary or a secondary source and what is the publisher relationship with the article subject.

Suggested solution requirements:
 * shows information about sources present in an article as a report
 * show a table in which the first column is the source itself (shown the same way it shows in reflist)
 * the second column of the table is either the date of the source publication or the author or the publisher or several of these columns at the same time (pulled from the source template metadata)
 * provides columns in which a comment may be added about the source publisher or author relationship with the article subject in prose (for example 'the artist's music publishing platform')
 * provides a column in which the source type may be selected (primary or secondary or independent)
 * provides a column in which the source peer reviewedness may be specified (peer reviewed or not)
 * outputs a chart which shows how many percent of the sources are which dates and which authors and which sources types
 * perhaps outputs a sources completeness score (percent formatted correctly, percent identified as secondary via some algorithm) and shows the score and the report to people who create new articles
 * people can edit the last few columns (relationship, source type, peer reviewed or not)

Example:

Statistics:
 * Date: 2018 (100%): January (50%), February (50%)
 * Authors: Google (50%), New York Times (50%)
 * Type: Primary: 50%, Third party: 50%

Implementation Questions:
 * Where could such source metadata be stored - which is not currently in the source template (such as whether it is primary or secondary)?