treewide: migrate to pluginRC for correct DAG order

The "new" DAG order is as follows:
- (luaConfigPre)
- globalsScript
- basic
- theme
- pluginConfigs
- extraPluginConfigs
- mappings
- (luaConfigPost)

modules/plugins/assistant/copilot/config.nix

@@ -34,7 +34,7 @@ in {
         "copilot-cmp"
       ];
 
-    vim.luaConfigRC.copilot = entryAnywhere ''
+    vim.pluginRC.copilot = entryAnywhere ''
       require("copilot").setup(${toLuaObject cfg.setupOpts})
 
       ${lib.optionalString cfg.cmp.enable ''