[chore] The Big Middleware and API Refactor (tm) (#1250)

* interim commit: start refactoring middlewares into package under router

* another interim commit, this is becoming a big job

* another fucking massive interim commit

* refactor bookmarks to new style

* ambassador, wiz zeze commits you are spoiling uz

* she compiles, we're getting there

* we're just normal men; we're just innocent men

* apiutil

* whoopsie

* i'm glad noone reads commit msgs haha :blob_sweat:

* use that weirdo go-bytesize library for maxMultipartMemory

* fix media module paths

internal/api/client/app/app.go

@@ -1,48 +0,0 @@
-/*
-   GoToSocial
-   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU Affero General Public License as published by
-   the Free Software Foundation, either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Affero General Public License for more details.
-
-   You should have received a copy of the GNU Affero General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-package app
-
-import (
-	"net/http"
-
-	"github.com/superseriousbusiness/gotosocial/internal/api"
-	"github.com/superseriousbusiness/gotosocial/internal/processing"
-	"github.com/superseriousbusiness/gotosocial/internal/router"
-)
-
-// BasePath is the base path for this api module
-const BasePath = "/api/v1/apps"
-
-// Module implements the ClientAPIModule interface for requests relating to registering/removing applications
-type Module struct {
-	processor processing.Processor
-}
-
-// New returns a new auth module
-func New(processor processing.Processor) api.ClientModule {
-	return &Module{
-		processor: processor,
-	}
-}
-
-// Route satisfies the RESTAPIModule interface
-func (m *Module) Route(s router.Router) error {
-	s.AttachHandler(http.MethodPost, BasePath, m.AppsPOSTHandler)
-	return nil
-}