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/tzdata/Pacific/Tongatapu

@@ -0,0 +1,16 @@
+# created by tools/tclZIC.tcl - do not edit
+
+set TZData(:Pacific/Tongatapu) {
+    {-9223372036854775808 44352 0 LMT}
+    {-767189952 44400 0 %z}
+    {-284041200 46800 0 %z}
+    {915102000 46800 0 %z}
+    {939214800 50400 1 %z}
+    {953384400 46800 0 %z}
+    {973342800 50400 1 %z}
+    {980596800 46800 0 %z}
+    {1004792400 50400 1 %z}
+    {1012046400 46800 0 %z}
+    {1478350800 50400 1 %z}
+    {1484398800 46800 0 %z}
+}