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/treesitter/config.nix

@@ -37,7 +37,7 @@ in {
       };
 
       # For some reason treesitter highlighting does not work on start if this is set before syntax on
-      luaConfigRC.treesitter-fold = mkIf cfg.fold (entryBefore ["basic"] ''
+      pluginRC.treesitter-fold = mkIf cfg.fold (entryBefore ["basic"] ''
         -- This is required by treesitter-context to handle folds
         vim.o.foldmethod = "expr"
         vim.o.foldexpr = "nvim_treesitter#foldexpr()"
@@ -48,7 +48,7 @@ in {
         vim.o.foldenable = false
       '');
 
-      luaConfigRC.treesitter = entryAfter ["basic"] ''
+      pluginRC.treesitter = entryAfter ["basic"] ''
         require('nvim-treesitter.configs').setup {
           -- Disable imperative treesitter options that would attempt to fetch
           -- grammars into the read-only Nix store. To add additional grammars here

modules/plugins/treesitter/ts-context/config.nix

@@ -16,7 +16,7 @@ in {
 
       # set up treesitter-context after Treesitter. The ordering
       # should not matter, but there is no harm in doing this
-      luaConfigRC.treesitter-context = entryAfter ["treesitter"] ''
+      pluginRC.treesitter-context = entryAfter ["treesitter"] ''
         require("treesitter-context").setup(${toLuaObject cfg.setupOpts})
       '';
     };