[feature] Instance rules (#2125)

* init instance rules database model, admin api

* expose instance rules in public instance api

* public /api/v1/instance/rules route

* GET ruleById

* createRule route

* createRule auth check

* updateRule

* deleteRule

* list rules on about page

* ruleGet auth

* add about page ids for anchors

* process and store adding violated rules to reports

* admin api models for instance rules

* instance rule edit frontend

* change rule inputs to textareas

* database fixes after rebase (#2124)

* remove unused imports

* fix db migration column name

* fix tests

* fix more tests

* fix postgres error with wrongly used Ident

* add some tests, fiddle with rule model a bit, fix postgres migration

* swagger docs

---------

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

internal/gtsmodel/instance.go

@@ -39,4 +39,5 @@ type Instance struct {
 	ContactAccount         *Account     `bun:"rel:belongs-to"`                                              // account corresponding to contactAccountID
 	Reputation             int64        `bun:",notnull,default:0"`                                          // Reputation score of this instance
 	Version                string       `bun:",nullzero"`                                                   // Version of the software used on this instance
+	Rules                  []Rule       `bun:"-"`                                                           // List of instance rules
 }