v0.6.4 - Retour onedir (configuration stable)

Changements :
- Retour a --onedir : seule configuration sans erreur DLL confirmee
- _internal/ recommite dans le repo
- build.bat restaure avec copie automatique de _internal/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

_internal/_tcl_data/opt0.4/pkgIndex.tcl

@@ -0,0 +1,12 @@
+# Tcl package index file, version 1.1
+# This file is generated by the "pkg_mkIndex -direct" command
+# and sourced either when an application starts up or
+# by a "package unknown" script.  It invokes the
+# "package ifneeded" command to set up package-related
+# information so that packages will be loaded automatically
+# in response to "package require" commands.  When this
+# script is sourced, the variable $dir must contain the
+# full path name of this file's directory.
+
+if {![package vsatisfies [package provide Tcl] 8.5-]} {return}
+package ifneeded opt 0.4.9 [list source -encoding utf-8 [file join $dir optparse.tcl]]