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/zh_hk.msg

@@ -1,28 +0,0 @@
-# created by tools/loadICU.tcl -- do not edit
-namespace eval ::tcl::clock {
-    ::msgcat::mcset zh_HK DAYS_OF_WEEK_ABBREV [list \
-        "\u65e5"\
-        "\u4e00"\
-        "\u4e8c"\
-        "\u4e09"\
-        "\u56db"\
-        "\u4e94"\
-        "\u516d"]
-    ::msgcat::mcset zh_HK MONTHS_ABBREV [list \
-        "1\u6708"\
-        "2\u6708"\
-        "3\u6708"\
-        "4\u6708"\
-        "5\u6708"\
-        "6\u6708"\
-        "7\u6708"\
-        "8\u6708"\
-        "9\u6708"\
-        "10\u6708"\
-        "11\u6708"\
-        "12\u6708"\
-        ""]
-    ::msgcat::mcset zh_HK DATE_FORMAT "%Y\u5e74%m\u6708%e\u65e5"
-    ::msgcat::mcset zh_HK TIME_FORMAT_12 "%P%I:%M:%S"
-    ::msgcat::mcset zh_HK DATE_TIME_FORMAT "%Y\u5e74%m\u6708%e\u65e5 %P%I:%M:%S %z"
-}