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/de_be.msg

@@ -1,53 +0,0 @@
-# created by tools/loadICU.tcl -- do not edit
-namespace eval ::tcl::clock {
-    ::msgcat::mcset de_BE DAYS_OF_WEEK_ABBREV [list \
-        "Son"\
-        "Mon"\
-        "Die"\
-        "Mit"\
-        "Don"\
-        "Fre"\
-        "Sam"]
-    ::msgcat::mcset de_BE DAYS_OF_WEEK_FULL [list \
-        "Sonntag"\
-        "Montag"\
-        "Dienstag"\
-        "Mittwoch"\
-        "Donnerstag"\
-        "Freitag"\
-        "Samstag"]
-    ::msgcat::mcset de_BE MONTHS_ABBREV [list \
-        "Jan"\
-        "Feb"\
-        "M\u00e4r"\
-        "Apr"\
-        "Mai"\
-        "Jun"\
-        "Jul"\
-        "Aug"\
-        "Sep"\
-        "Okt"\
-        "Nov"\
-        "Dez"\
-        ""]
-    ::msgcat::mcset de_BE MONTHS_FULL [list \
-        "Januar"\
-        "Februar"\
-        "M\u00e4rz"\
-        "April"\
-        "Mai"\
-        "Juni"\
-        "Juli"\
-        "August"\
-        "September"\
-        "Oktober"\
-        "November"\
-        "Dezember"\
-        ""]
-    ::msgcat::mcset de_BE AM "vorm"
-    ::msgcat::mcset de_BE PM "nachm"
-    ::msgcat::mcset de_BE DATE_FORMAT "%Y-%m-%d"
-    ::msgcat::mcset de_BE TIME_FORMAT "%T"
-    ::msgcat::mcset de_BE TIME_FORMAT_12 "%T"
-    ::msgcat::mcset de_BE DATE_TIME_FORMAT "%a %d %b %Y %T %z"
-}