refactor: directory path handling

intsead of storing path as field in directories table, it is derived on demand, because it makes moving directories a heck lot eaiser

Co-authored-by: Ona <no-reply@ona.com>

packages/convex/model/filesystem.ts

@@ -0,0 +1,17 @@
+import type { Id } from "../_generated/dataModel"
+
+export type DirectoryPathComponent = {
+	id: Id<"directories">
+	name: string
+}
+
+export type FilePathComponent = {
+	id: Id<"files">
+	name: string
+}
+
+export type PathComponent = FilePathComponent | DirectoryPathComponent
+
+export type FilePath = [...DirectoryPathComponent[], PathComponent]
+
+export type ReverseFilePath = [PathComponent, ...DirectoryPathComponent[]]