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/mt.msg

@@ -0,0 +1,27 @@
+# created by tools/loadICU.tcl -- do not edit
+namespace eval ::tcl::clock {
+    ::msgcat::mcset mt DAYS_OF_WEEK_ABBREV [list \
+        "\u0126ad"\
+        "Tne"\
+        "Tli"\
+        "Erb"\
+        "\u0126am"\
+        "\u0120im"]
+    ::msgcat::mcset mt MONTHS_ABBREV [list \
+        "Jan"\
+        "Fra"\
+        "Mar"\
+        "Apr"\
+        "Mej"\
+        "\u0120un"\
+        "Lul"\
+        "Awi"\
+        "Set"\
+        "Ott"\
+        "Nov"]
+    ::msgcat::mcset mt BCE "QK"
+    ::msgcat::mcset mt CE ""
+    ::msgcat::mcset mt DATE_FORMAT "%A, %e ta %B, %Y"
+    ::msgcat::mcset mt TIME_FORMAT_12 "%l:%M:%S %P"
+    ::msgcat::mcset mt DATE_TIME_FORMAT "%A, %e ta %B, %Y %l:%M:%S %P %z"
+}