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/Note.go

@@ -0,0 +1,33 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// Data defined in extra structs:
+// - Attachments: models.NoteToAttachment
+// - Emotes: models.NoteToEmote
+// - Pings: models.NoteToPing
+// - Tags: models.NoteTag
+type Note struct {
+	ID        string    `gorm:"primarykey"` // Make ID a string (uuid) for other implementations
+	CreatedAt time.Time // When this entry was created
+	UpdatedAt time.Time // When this entry was last updated
+	// When this entry was deleted (for soft deletions)
+	// Soft delete means that this entry still exists in the db, but gorm won't include it anymore unless specifically told to
+	// If not null, this entry is marked as deleted
+	DeletedAt gorm.DeletedAt `gorm:"index"`
+	// Creator   Account        // `gorm:"foreignKey:CreatorId;references:ID"` // Account that created the post
+	CreatorId string
+	Remote    bool // Whether the note is originally a remote one and just "cached"
+	// Raw content of the note. So without additional formatting applied
+	// Might already have formatting applied beforehand from the origin server
+	RawContent     string
+	ContentWarning *string         // Content warnings of the note, if it contains any
+	RepliesTo      *string         // Url of the message this replies to
+	Quotes         *string         // url of the message this note quotes
+	AccessLevel    NoteAccessLevel // Where to send this message to (public, home, followers, dm)
+	OriginServer   string          // Url of the origin server. Also the primary key for those
+}