Add sortable publication year field to the instance record

Background:
The existing implementation of the dateOfPublication allow for storing data in the format that prevents sorting by publication year and make filtering inefficient. The examples of the data that is currently stored include:

• ©2001
• [1969?]
• [between 1900 and 1999]
• cop 1997
• hafniae MCMLXXI,
• 1391 [2012 or 2013]

Purpose/Overview:
The purpose of this story is to provide a field that will allow for sorting and filtering by the publication year

Requirements/Scope:
The publication year may have following formats:

1. be empty
2. consist out of four digits
3. consist out of start date (empty,four digits)
4. consist out of end date (empty,four digits)

Examples of possible scenarios:
Assuming that there are two fields associated with an instance that can store publication year related data, the information should be represented as follow:

Additional information:
Sorting (to be implemented in a separate user story, here for informational purpose only):

Approach:
TBD by developers

Acceptance criteria:
1. The field is added
2. The field can be populated with relevant data when:

• publication year is known
• publication start year is known
• publication end year is known
• publication year, start or end year are unknown

3. migration scripts are provided Moved to MODINVSTOR-724

Out of scope:
UI implementation