move script descriptions to readme

scripts/niss-misc.nix

@@ -34,21 +34,5 @@ in
        map (d: "cp ${dir d}/* $out/bin") (lib.attrNames deps) ++
        [ "chmod a+x $out/bin/*" ]);
 
-    meta = {
-      description = "niss's funny little scripts";
-      longDescription = ''
-        - `galleryHelpers`: helper scripts for putting together the input for
-          `gallery.niss.website`. exceedingly unlikely to be useful to anyone
-          else.
-        - `charFilters`: `little` for making text ˡⁱᵏᵉ ᵗʰⁱˢ and `wide` for
-          text ｌｉｋｅ　ｔｈｉｓ.
-        - find-parent:
-          `find-parent ‹file›` looks for `‹file›` in the current directory or
-          any of its ancestors, and prints the path of the file found, if any.
-          `find-parent -d ‹file›` prints the path of only the directory
-          containing the file, rather than the file itself.
-        - nd: looks for a `flake.nix` and runs `nix develop` if so.
-          uses `find-parent`.
-      '';
-    };
+    meta.description = "niss's funny little scripts";
   }