use starlight-openapi plugin to generate docs

closes #536

refactor(plugins): create Field objects per field type in settings forms + handle rendering in class

update manifest.schema.json to have defaultValue type differ based on field type

update php and js packages to latest

- update docs
- render hint and helper options for all fields
- replace option's hint with
description

add hint to select options + update dependencies to latest

- change language keys to kebab-case
- add new languages to docs: ca, de, es, sr-latn, zh-hans

refs #457

closes #408

update dev setup docs + build and deploy docs everytime