Support custom data fields in archive

[btjanaka]

Description

This PR adds support for creating custom fields in the archive. Support for passing custom fields through other components will be added in a future PR.

TODO

• [x] Add extra_fields to ArchiveBase.__init__
• [x] Add extra_fields to other archive init methods
• [x] Add fields to add and add_single methods
• [x] Add fields to sliding boundaries archive add method
• [x] Add field validation method
• [x] Add test for extra fields

Questions

Status

• [x] I have read the guidelines in CONTRIBUTING.md
• [x] I have formatted my code using yapf
• [x] I have tested my code by running pytest
• [x] I have linted my code with pylint
• [x] I have added a one-line description of my change to the changelog in HISTORY.md
• [x] This PR is ready to go