Early work on file stuff.

internal/auth/permissions.go

@@ -25,6 +25,8 @@ func AllPermissions() map[string]string {
 		"story.remove":     "Can remove non-owned stories",
 		"story.unlisted":   "Can view non-owned unlisted stories",
 		"file.upload":      "Can upload files",
+		"file.list":        "Can list non-owned files",
+		"file.view":        "Can view non-owned files",
 		"file.edit":        "Can edit non-owned files",
 		"file.remove":      "Can remove non-owned files",
 	}

internal/generate/id.go

@@ -52,3 +52,8 @@ func StoryID() string {
 func ChapterID() string {
 	return ID("SC", 24)
 }
+
+// FileID generates a file ID.
+func FileID() string {
+	return ID("F", 16)
+}