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/cs.msg

@@ -1,54 +0,0 @@
-# created by tools/loadICU.tcl -- do not edit
-namespace eval ::tcl::clock {
-    ::msgcat::mcset cs DAYS_OF_WEEK_ABBREV [list \
-        "Ne"\
-        "Po"\
-        "\u00dat"\
-        "St"\
-        "\u010ct"\
-        "P\u00e1"\
-        "So"]
-    ::msgcat::mcset cs DAYS_OF_WEEK_FULL [list \
-        "Ned\u011ble"\
-        "Pond\u011bl\u00ed"\
-        "\u00dater\u00fd"\
-        "St\u0159eda"\
-        "\u010ctvrtek"\
-        "P\u00e1tek"\
-        "Sobota"]
-    ::msgcat::mcset cs MONTHS_ABBREV [list \
-        "I"\
-        "II"\
-        "III"\
-        "IV"\
-        "V"\
-        "VI"\
-        "VII"\
-        "VIII"\
-        "IX"\
-        "X"\
-        "XI"\
-        "XII"\
-        ""]
-    ::msgcat::mcset cs MONTHS_FULL [list \
-        "leden"\
-        "\u00fanor"\
-        "b\u0159ezen"\
-        "duben"\
-        "kv\u011bten"\
-        "\u010derven"\
-        "\u010dervenec"\
-        "srpen"\
-        "z\u00e1\u0159\u00ed"\
-        "\u0159\u00edjen"\
-        "listopad"\
-        "prosinec"\
-        ""]
-    ::msgcat::mcset cs BCE "p\u0159.Kr."
-    ::msgcat::mcset cs CE "po Kr."
-    ::msgcat::mcset cs AM "dop."
-    ::msgcat::mcset cs PM "odp."
-    ::msgcat::mcset cs DATE_FORMAT "%e.%m.%Y"
-    ::msgcat::mcset cs TIME_FORMAT "%k:%M:%S"
-    ::msgcat::mcset cs DATE_TIME_FORMAT "%e.%m.%Y %k:%M:%S %z"
-}