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/fo.msg

@@ -1,47 +0,0 @@
-# created by tools/loadICU.tcl -- do not edit
-namespace eval ::tcl::clock {
-    ::msgcat::mcset fo DAYS_OF_WEEK_ABBREV [list \
-        "sun"\
-        "m\u00e1n"\
-        "t\u00fds"\
-        "mik"\
-        "h\u00f3s"\
-        "fr\u00ed"\
-        "ley"]
-    ::msgcat::mcset fo DAYS_OF_WEEK_FULL [list \
-        "sunnudagur"\
-        "m\u00e1nadagur"\
-        "t\u00fdsdagur"\
-        "mikudagur"\
-        "h\u00f3sdagur"\
-        "fr\u00edggjadagur"\
-        "leygardagur"]
-    ::msgcat::mcset fo MONTHS_ABBREV [list \
-        "jan"\
-        "feb"\
-        "mar"\
-        "apr"\
-        "mai"\
-        "jun"\
-        "jul"\
-        "aug"\
-        "sep"\
-        "okt"\
-        "nov"\
-        "des"\
-        ""]
-    ::msgcat::mcset fo MONTHS_FULL [list \
-        "januar"\
-        "februar"\
-        "mars"\
-        "apr\u00edl"\
-        "mai"\
-        "juni"\
-        "juli"\
-        "august"\
-        "september"\
-        "oktober"\
-        "november"\
-        "desember"\
-        ""]
-}