Pyxel

- Added error messages for the pyxel command
- Updated crate versions

- Changed the location of pyproject.toml and requirements.txt
- Fixed the sqrt function
- Fixed a non pixel perfect bug for OpenGL ES
- Added support for encodings other than UTF-8 in the app2exe command

- Fixed the timing to disable the slide effect
- Fixed the release script

- Changed the directory structure of the project
- Organized project metadata for Rust and Python
- Disabled the slide effect on the first note of a sound
- Fixed clippy warnings

- Turned off the high DPI mode for performance perspective
- Added a shortcut to output the current color palette
- Added load_tmx and load method to the Tilemap class
- Enabled importing a TMX file via drag and drop in Tilemap Editor
- Changed destination for image drag-and-drop in Image Editor
- Refined the code for Example 9 and Example 10
- Added a incl_colors option to the from_image method of the Image class
- Added a incl_colors option to the load method of the Image class
- Added Example 15
- Refined Example 10
- Fixed a color count change bug on OpenGL ES

- Added support for high DPI mode
- Changed the way to determine whether to use OpenGL or OpenGL ES