refactor: refactor authentication pages into their own modules

pkg/webapp/models/pages.go

@@ -1,12 +0,0 @@
-package models
-
-type Metadata struct {
-	Title          string `json:"title"`
-	Description    string `json:"description"`
-	OpenGraphImage string `json:"openGraphImage"`
-	TwitterImage   string `json:"twitterImage"`
-	Tags           string `json:"tags"`
-	Category       string `json:"category"`
-	Favicon        string `json:"favicon"`
-	URL            string `json:"url"`
-}