Add config file for links to related resources for sources

[StephenAbbott]

At present, the BODS data analysis tools process data from each source and offer links to the different hosted databases produced. Upcoming tasks involve adding additional formats like xlsx #8 and Parquet #10

But going forward, I'd also like to be able to link to additional resources from Open Ownership which either use or power the data available from each source. Ideally these links for each source could simply be added in a config file on Github.

Here is a list of example resources I'd like to be able to link to for each source:

• Github repository for ingesting source data - e.g. https://github.com/openownership/register-ingester-psc
• Data analysis notebook - e.g. https://deepnote.com/@open-ownership/latviademo-4b182b6b-8b8d-4255-97b4-37434c6929c6
• Data source page from the Open Ownership Register - e.g. https://register.openownership.org/data_sources/uk-psc-register
• Open Ownership research - e.g. https://www.openownership.org/en/news/our-quick-assessment-of-nigerias-first-public-register-a-strong-start-but-more-to-be-done/
• Original technical documentation - e.g. https://developer-specs.company-information.service.gov.uk/companies-house-public-data-api/reference/persons-with-significant-control

This list is non-comprehensive and may be different for each source so it would probably be easiest to make the link text editable for each resource.