feat: Notifiers CRUD (#337)

* introduce scaffold for new models

* wip: shoutrrr wrapper (may remove)

* update schema files

* gen: ent code

* gen: migrations

* go mod tidy

* add group_id to notifier

* db migration

* new mapper helpers

* notifier repo

* introduce experimental adapter pattern for hdlrs

* refactor adapters to fit more common use cases

* new routes for notifiers

* update errors to fix validation panic

* go tidy

* reverse checkbox label display

* wip: notifiers UI

* use badges instead of text

* improve documentation

* add scaffold schema reference

* remove notifier service

* refactor schema folder

* support group edges via scaffold

* delete test file

* include link to API docs

* audit and update documentation + improve format

* refactor schema edges

* refactor

* add custom validator

* set validate + order fields by name

* fix failing tests

backend/internal/web/adapters/query.go

@@ -0,0 +1,72 @@
+package adapters
+
+import (
+	"net/http"
+
+	"github.com/hay-kot/homebox/backend/pkgs/server"
+)
+
+// Query is a server.Handler that decodes a query from the request and calls the provided function.
+//
+// Example:
+//
+//	type Query struct {
+//	    Foo string `schema:"foo"`
+//	}
+//
+//	fn := func(ctx context.Context, q Query) (any, error) {
+//	    // do something with q
+//		return nil, nil
+//	}
+//
+//	r.Get("/foo", adapters.Query(fn, http.StatusOK))
+func Query[T any, Y any](f AdapterFunc[T, Y], ok int) server.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) error {
+		q, err := decodeQuery[T](r)
+		if err != nil {
+			return err
+		}
+
+		res, err := f(r.Context(), q)
+		if err != nil {
+			return err
+		}
+
+		return server.Respond(w, ok, res)
+	}
+}
+
+// QueryID is a server.Handler that decodes a query and an ID from the request and calls the provided function.
+//
+// Example:
+//
+//	type Query struct {
+//	    Foo string `schema:"foo"`
+//	}
+//
+//	fn := func(ctx context.Context, ID uuid.UUID, q Query) (any, error) {
+//	    // do something with ID and q
+//		return nil, nil
+//	}
+//
+//	r.Get("/foo/{id}", adapters.QueryID(fn, http.StatusOK))
+func QueryID[T any, Y any](param string, f IDFunc[T, Y], ok int) server.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) error {
+		ID, err := routeUUID(r, param)
+		if err != nil {
+			return err
+		}
+
+		q, err := decodeQuery[T](r)
+		if err != nil {
+			return err
+		}
+
+		res, err := f(r.Context(), ID, q)
+		if err != nil {
+			return err
+		}
+
+		return server.Respond(w, ok, res)
+	}
+}