chore: add changelog to package data dir

dzgui/data/CHANGELOG.md

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+## Added
+- Add pyproject.toml file
+- requests, packaging.version, psutil
+- Lockfile
+- Changelog text wrapping and formatting
+- Decouple UI components into modules
+- Choose from kilometer or miles distance display
+- More granular haversine calculation
+- Parse XDG data dirs with fallbacks
+- Dedicated mods page
+- Dedicated thanks page
+- Rearrange menus/breadcrumbs
+- Documentation ships with source
+- Open filepicker when generating system log
+
+## Changed
+- Reduce padding on keys button
+- Add icon to keys button
+- Add icons to API buttons
+- Boldface breadcrumbs
+
+## Unreleased
+- Setup wizard
+- Integrate add/connect widgets into main menu