plugins: use new config-aware mkMappingOption

Generated using:

- `sd -F "inherit (lib.nvim.binds) mkMappingOption;" "inherit (config.vim.lib) mkMappingOption;" $(find . -type f)`
- `sd -F "{lib, ...}: let" "{config, lib, ...}: let" $(find . -type f)`

Tweaked manually (placement in inherit list, fixing todo-comments and toggleterm).

Ran `nix run nixpkgs#deadnix -- -e` to clean up.
Next commit includes unrelated dead code.

modules/plugins/languages/scala.nix

@@ -6,13 +6,13 @@
 }: let
   inherit (lib.generators) mkLuaInline;
   inherit (lib.modules) mkIf mkMerge;
-  inherit (lib.nvim.binds) mkMappingOption;
   inherit (lib.nvim.dag) entryAfter;
   inherit (lib.nvim.lua) toLuaObject;
   inherit (lib.nvim.types) mkGrammarOption luaInline;
   inherit (lib.options) mkOption mkEnableOption mkPackageOption literalExpression;
   inherit (lib.strings) optionalString;
   inherit (lib.types) attrsOf anything bool;
+  inherit (config.vim.lib) mkMappingOption;
 
   listCommandsAction =
     if config.vim.telescope.enable