Rework backing storage system

Step one: Copy the struct definitions over into a new, dedicated
submodule
Step two: Make a generator script
Step three: Define helper functions for various queries

storage-new/models/Emote.go

@@ -0,0 +1,12 @@
+package models
+
+import "gorm.io/gorm"
+
+type Emote struct {
+	gorm.Model
+	// Metadata   MediaMetadata // `gorm:"foreignKey:MetadataId"`
+	MetadataId string
+	Name       string
+	// Server     RemoteServer // `gorm:"foreignKey:ServerId;references:ID"`
+	ServerId uint
+}