Fix ignore patterns

[bollwyvl]

References

Apparently can't create any kind of issues right now?

Code changes

Ignore patterns were checking against the full URI, which broke in some (many) settings. This adopts src-relative default patterns, and adds them to the schema as a list.

User-facing changes

Will copy files from more places.

Backwards-incompatible changes

None

Chores

• [x] linted
• [x] tested
• [x] documented
• [x] changelog entry