telescope: correctly nest pickers under setupOpts

Applies the following fixes:
- Correctly nests "pickers" config under "telescope.setupOpts"
- Correctly nests "find_command" config under "telescope.setupOpts.pickers.find_files"
- Sets the find_command to mimic pre-fix behavior with "fd --type=file"

docs/release-notes/rl-0.8.md

@@ -280,3 +280,11 @@
 [Sc3l3t0n](https://github.com/Sc3l3t0n):
 
 - Add F# support under `vim.languages.fsharp`.
+
+[tebuevd](https://github.com/tebuevd):
+
+- Fix `pickers` configuration for `telescope` by nesting it under `setupOpts`
+- Fix `find_command` configuration for `telescope` by nesting it under
+  `setupOpts.pickers.find_files`
+- Update default `telescope.setupOpts.pickers.find_files.find_command` to only
+  include files (and therefore exclude directories from results)

modules/plugins/utility/telescope/telescope.nix

@@ -8,6 +8,12 @@
   inherit (lib.nvim.binds) mkMappingOption;
   inherit (lib.nvim.types) mkPluginSetupOption luaInline;
   setupOptions = {
+    pickers.find_files.find_command = mkOption {
+      description = "cmd to use for finding files";
+      type = either (listOf str) luaInline;
+      default = ["${pkgs.fd}/bin/fd" "--type=file"];
+    };
+
     defaults = {
       vimgrep_arguments = mkOption {
         description = ''
@@ -27,11 +33,6 @@
           "--no-ignore"
         ];
       };
-      pickers.find_command = mkOption {
-        description = "cmd to use for finding files";
-        type = either (listOf str) luaInline;
-        default = ["${pkgs.fd}/bin/fd"];
-      };
       prompt_prefix = mkOption {
         description = "Shown in front of Telescope's prompt";
         type = str;