[Frontend] Settings for profile fields (#1885)

* get max emoji size from instance settings

* expose (hardcoded) max amount of profile fields in instance api

* basic profile field setting

* fix profile field hook structure for updates

* *twirls mustache* fix ze tests

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Co-authored-by: tsmethurst <tobi.smethurst@protonmail.com>

web/source/settings/lib/form/index.js

@@ -74,6 +74,7 @@ module.exports = {
 	useRadioInput: makeHook(require("./radio")),
 	useComboBoxInput: makeHook(require("./combo-box")),
 	useCheckListInput: makeHook(require("./check-list")),
+	useFieldArrayInput: makeHook(require("./field-array")),
 	useValue: function (name, value) {
 		return {
 			name,