modules/performance: add ability to byte-compile plugin lua dependencies

This commit adds byte compiling of plugin lua dependencies
(specifically propagatedBuildInputs). It's enabled by
`performance.byteCompileLua.luaLib` option.

modules/top-level/plugins/byte-compile-lua-lib.nix

@@ -0,0 +1,28 @@
+/*
+  Byte compiling of lua dependencies of normalized plugin list
+
+  Inputs: List of normalized plugins
+  Outputs: List of normalized plugins with all the propagatedBuildInputs byte-compiled
+*/
+{ lib, pkgs }:
+let
+  builders = lib.nixvim.builders.withPkgs pkgs;
+  inherit (import ./utils.nix lib) mapNormalizedPlugins;
+
+  # Byte-compile only lua dependencies
+  byteCompileDeps =
+    drv:
+    drv.overrideAttrs (
+      prev:
+      lib.optionalAttrs (prev ? propagatedBuildInputs) {
+        propagatedBuildInputs = map byteCompile prev.propagatedBuildInputs;
+      }
+    );
+  # Byte-compile derivation (but only if it's a lua module) and its dependencies
+  byteCompile =
+    drv:
+    byteCompileDeps (
+      if pkgs.luaPackages.luaLib.hasLuaModule drv then builders.byteCompileLuaDrv drv else drv
+    );
+in
+mapNormalizedPlugins byteCompileDeps