v0.6.0 - Ajout _internal pour fix erreur DLL

Changements :
- Ajout du dossier _internal/ (DLL Python generees par PyInstaller --onedir)
- Resout l'erreur "Failed to load Python DLL" : plus d'extraction dans %TEMP%
- build.bat copie automatiquement _internal/ a la racine apres chaque build
- _internal/ a re-committer uniquement si la version de Python change

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

_internal/_tcl_data/tzdata/Asia/Singapore

@@ -0,0 +1,13 @@
+# created by tools/tclZIC.tcl - do not edit
+
+set TZData(:Asia/Singapore) {
+    {-9223372036854775808 24925 0 LMT}
+    {-2177477725 24925 0 SMT}
+    {-2038200925 25200 0 %z}
+    {-1167634800 26400 1 %z}
+    {-1073028000 26400 0 %z}
+    {-894180000 27000 0 %z}
+    {-879665400 32400 0 %z}
+    {-767005200 27000 0 %z}
+    {378662400 28800 0 %z}
+}