assistant/avante.nvim apply suggested changes

Change the options to use mkOption when applicable and apply changes to
descriptions
Change the building of the vimPlugin to use npin dependencies instead of
dependencies from nixpkgs

flake/avante-nvim/default.nix

@@ -10,6 +10,7 @@
   pkgs,
   version,
   src,
+  pins,
 }: let
   inherit version src;
   avante-nvim-lib = rustPlatform.buildRustPackage {
@@ -44,20 +45,20 @@ in
     pname = "avante-nvim";
     inherit version src;
 
-    dependencies = with vimPlugins; [
-      nvim-treesitter
-      dressing-nvim
-      plenary-nvim
-      nui-nvim
-
-      # optional, not sure how we best deal with adding these as options for the user to set
-      mini-pick
-      telescope-nvim
-      nvim-cmp
-      fzf-lua
-      nvim-web-devicons
-      img-clip-nvim
-    ];
+    dependencies =
+      [vimPlugins.nvim-treesitter]
+      ++ (builtins.map (name: let
+        pin = pins.${name};
+      in
+        pkgs.fetchFromGitHub {
+          inherit (pin.repository) owner repo;
+          rev = pin.revision;
+          sha256 = pin.hash;
+        }) [
+        "dressing-nvim"
+        "plenary-nvim"
+        "nui-nvim"
+      ]);
 
     postInstall = let
       ext = stdenv.hostPlatform.extensions.sharedLibrary;
@@ -69,15 +70,6 @@ in
       ln -s ${avante-nvim-lib}/lib/libavante_html2md${ext} $out/build/avante_html2md${ext}
     '';
 
-    passthru = {
-      updateScript = nix-update-script {
-        attrPath = "vimPlugins.avante-nvim.avante-nvim-lib";
-      };
-
-      # needed for the update script
-      inherit avante-nvim-lib;
-    };
-
     nvimSkipModules = [
       # Requires setup with corresponding provider
       "avante.providers.azure"