Moving source to components

[odscrachel]

Overview

• What does this pull request do?

Move source from defs to components file
Update person record and statement files to point to components for source

• How can a reviewer test or examine your changes?

Check that it looks valid and that we haven't missed source pointers anywhere else

• Who is best placed to review it?

@kd-ods

Closes #622

Translations

• New or edited strings appearing as a result of this PR will be picked up for translation
• I've notified the translation coordinator of any new strings that will need
  translating. See: https://openownership.github.io/bods-dev-handbook/translations.html

Documentation & Release

• I've checked that the documentation builds without failing. See: https://github.com/openownership/data-standard#building-the-documentation-locally
• I've thought about how and when this needs to be released. See:
  https://openownership.github.io/bods-dev-handbook/standard_releases.html
• I've updated the changelog, if necessary.
• I've updated reference.rst to reflect any changes to schema structure or naming.
• I've added or edited any other related documentation. See: https://github.com/openownership/bods-dev-handbook/blob/master/style_guide.md

[kd-ods]

@odscrachel - this looks good. I'm going to hold off approving it until #623 is merged... since I think it'll be easier to deal with the merge conflicts here.

[kd-ods]

@odscrachel - I've merged #623 so there are some conflicts here that need to be resolved. I can do that with you if helpful, since I'll recognise the edits that you'll need to accept.

[odscrachel]

@kd-ods ready to review again, the conflicts were the main changes in this PR

[kd-ods]

Resolving the merge conflicts meant accepting the new description and title edits for the Source object in its old position in statement.json. So you'll see that the Source object in its new position in components.json still has the old text.

I've made suggested edits to fix that.

[kd-ods]

Great - this can be merged now :-)