refactor(:lang): move tree-sitter init

Moved add-hook calls (for tree-sitter initialization) into their
respective modes' config blocks, or nearby, to be consistent with how
other, similar tools (like lsp!) are initialized, and does so at
runtime, rather than at expansion/compile time, which eval-when! caused.

modules/lang/cc/config.el

@@ -67,6 +67,11 @@ This is ignored by ccls.")
     :return "return"
     :yield "#require")
 
+  (when (featurep! +tree-sitter)
+    (add-hook! '(c-mode-local-vars-hook
+                 c++-mode-local-vars-hook)
+               :append #'tree-sitter!))
+
   ;; HACK Suppress 'Args out of range' error in when multiple modifications are
   ;;      performed at once in a `c++-mode' buffer, e.g. with `iedit' or
   ;;      multiple cursors.
@@ -304,9 +309,3 @@ If rtags or rdm aren't available, fail silently instead of throwing a breaking e
                                               "-isystem/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include"
                                               "-isystem/usr/local/include"]
                                   :resourceDir (cdr (doom-call-process "clang" "-print-resource-dir"))))))))
-
-;; Tree sitter
-(eval-when! (featurep! +tree-sitter)
-  (add-hook! '(c-mode-local-vars-hook
-               c++-mode-local-vars-hook)
-             #'tree-sitter!))