update undocumented type definitions

src/types.ts

@@ -118,6 +118,12 @@ export interface PackMetaData {
         "quilt"?: string
         /** The version of Liteloader used by this modpack. */
         "liteloader"?: string
+        /**
+         * The version of NeoForge used by this modpack.
+         * 
+         * This is an undocumented variable in packwiz,
+         * so this documentation may be inaccurate.
+         */
         "neoforge"?: string
     },
     /** Additional options */
@@ -239,7 +245,13 @@ export interface PackFileMetaData {
         "hash": Hash
         /** The URL to download the mod from. @see {@link Url} */
         "url"?: Url
-        "mode"?: string
+        /**
+         * Indicates that this file must be downloaded using the curseforge API to retreive a download url,
+         * instead of storing the direct download url in the pack, to comply with curseforge API usage requirements.
+         * 
+         * This is an undocumented variable in packwiz, so this documentation may be inacurate.
+         */
+        "mode"?: "metadata:curseforge"
     }
     /**
      * Information about the optional state of this mod.