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/is.msg

@@ -1,50 +0,0 @@
-# created by tools/loadICU.tcl -- do not edit
-namespace eval ::tcl::clock {
-    ::msgcat::mcset is DAYS_OF_WEEK_ABBREV [list \
-        "sun."\
-        "m\u00e1n."\
-        "\u00feri."\
-        "mi\u00f0."\
-        "fim."\
-        "f\u00f6s."\
-        "lau."]
-    ::msgcat::mcset is DAYS_OF_WEEK_FULL [list \
-        "sunnudagur"\
-        "m\u00e1nudagur"\
-        "\u00feri\u00f0judagur"\
-        "mi\u00f0vikudagur"\
-        "fimmtudagur"\
-        "f\u00f6studagur"\
-        "laugardagur"]
-    ::msgcat::mcset is MONTHS_ABBREV [list \
-        "jan."\
-        "feb."\
-        "mar."\
-        "apr."\
-        "ma\u00ed"\
-        "j\u00fan."\
-        "j\u00fal."\
-        "\u00e1g\u00fa."\
-        "sep."\
-        "okt."\
-        "n\u00f3v."\
-        "des."\
-        ""]
-    ::msgcat::mcset is MONTHS_FULL [list \
-        "jan\u00faar"\
-        "febr\u00faar"\
-        "mars"\
-        "apr\u00edl"\
-        "ma\u00ed"\
-        "j\u00fan\u00ed"\
-        "j\u00fal\u00ed"\
-        "\u00e1g\u00fast"\
-        "september"\
-        "okt\u00f3ber"\
-        "n\u00f3vember"\
-        "desember"\
-        ""]
-    ::msgcat::mcset is DATE_FORMAT "%e.%m.%Y"
-    ::msgcat::mcset is TIME_FORMAT "%H:%M:%S"
-    ::msgcat::mcset is DATE_TIME_FORMAT "%e.%m.%Y %H:%M:%S %z"
-}