v0.6.4 - Retour onedir (configuration stable)

Changements :
- Retour a --onedir : seule configuration sans erreur DLL confirmee
- _internal/ recommite dans le repo
- build.bat restaure avec copie automatique de _internal/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

_internal/_tcl_data/msgs/gl.msg

@@ -0,0 +1,47 @@
+# created by tools/loadICU.tcl -- do not edit
+namespace eval ::tcl::clock {
+    ::msgcat::mcset gl DAYS_OF_WEEK_ABBREV [list \
+        "Dom"\
+        "Lun"\
+        "Mar"\
+        "M\u00e9r"\
+        "Xov"\
+        "Ven"\
+        "S\u00e1b"]
+    ::msgcat::mcset gl DAYS_OF_WEEK_FULL [list \
+        "Domingo"\
+        "Luns"\
+        "Martes"\
+        "M\u00e9rcores"\
+        "Xoves"\
+        "Venres"\
+        "S\u00e1bado"]
+    ::msgcat::mcset gl MONTHS_ABBREV [list \
+        "Xan"\
+        "Feb"\
+        "Mar"\
+        "Abr"\
+        "Mai"\
+        "Xu\u00f1"\
+        "Xul"\
+        "Ago"\
+        "Set"\
+        "Out"\
+        "Nov"\
+        "Dec"\
+        ""]
+    ::msgcat::mcset gl MONTHS_FULL [list \
+        "Xaneiro"\
+        "Febreiro"\
+        "Marzo"\
+        "Abril"\
+        "Maio"\
+        "Xu\u00f1o"\
+        "Xullo"\
+        "Agosto"\
+        "Setembro"\
+        "Outubro"\
+        "Novembro"\
+        "Decembro"\
+        ""]
+}