v0.6.2 - Retour en onefile, suppression _internal

Changements :
- Retour a --onefile : exe unique, plus besoin de _internal/
- Le fix Zone.Identifier (v0.5.9) resout le probleme de DLL pour les exe telecharges
- Suppression de _internal/ du repo et ajout au .gitignore
- build.bat simplifie

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

_internal/_tcl_data/msgs/fa_ir.msg

@@ -1,9 +0,0 @@
-# created by tools/loadICU.tcl -- do not edit
-namespace eval ::tcl::clock {
-    ::msgcat::mcset fa_IR AM "\u0635\u0628\u062d"
-    ::msgcat::mcset fa_IR PM "\u0639\u0635\u0631"
-    ::msgcat::mcset fa_IR DATE_FORMAT "%d\u2044%m\u2044%Y"
-    ::msgcat::mcset fa_IR TIME_FORMAT "%S:%M:%H"
-    ::msgcat::mcset fa_IR TIME_FORMAT_12 "%S:%M:%l %P"
-    ::msgcat::mcset fa_IR DATE_TIME_FORMAT "%d\u2044%m\u2044%Y %S:%M:%H %z"
-}