feat: dzgui 7 alpha

docs/source/locale.rst

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+Locale support
+==================
+
+For internationalization purposes, DZGUI will inherit the default locale setting on the system when displaying numbers.
+
+This is used for thousands separators in long numbers and decimal separators in fractional numbers.
+
+If you wish to use a specific regional numbering preference while retaining a different base system language (e.g., English language with German-style numbering), pass the desired locale as a variable before launching DZGUI:
+
+``LC_ALL=de_DE.UTF-8 ./dzgui.sh``
+
+If you intend to use this frequently, you could wrap the above in a script or alias.