Plone.restapi

Bug fixes:

- Fix possible startup error by explicitly loading
`plone.app.contentrules` zcml. Also: only load code related to
contentrules when this package is available. maurits (1644)

New features:

- Create relations service. Query, add, delete. ksuess (1432)

New features:

- Add portal_type title (`type_title`) to content response razvanMiu
nileshgulia1 (1355)
- Added support for nested schemas with resolveuid deserializer
JeffersonBledsoe (1595)

Bug fixes:

- Fix missing metadata_fields in Response via GET Request to Endpoint
/querystring-search 1letter (1628)
- Respect Password Policy tschorr (1630)

Internal:

- Update buildout and requirements to Plone-6.0.4 1letter (1632)

New features:

- Apply a cache ruleset to the /querystring-search endpoint.
ericof (1626)

Bug fixes:

- Fix bugs in handling parameters when the `querystringsearch`
endpoint is called with the GET method. davisagli (1621)

New features:

- Add UID to relationvalue_converter summary. ksuess (1605)
- Add querystring_search get method. robgietema (1616)

Bug fixes:

- Fix a bunch of deprecation warnings in a Plone 5.2 compatible way.
Applied proper isort. Fixed unclosed file issues in a test. Added
Python 3.11 to test matrix. jensens (1606)
- No longer declare support for Python 3.6 (it was already not
tested). davisagli (1615)
- Fixed encoding issue on Python 3 for some mail servers. This could
result in missing characters in an email body. maurits (3754)