docs(SPDX): Bill of material generated by reuse in SPDX format added

docs(README): Add reuse.software compliance badge

docs: Overview of assets that can be customized and their purpose

chore(css): Add additional copyright to file header

fix: Ensure assets don't get cached, force load on refresh

feat: Re-brand 'Flappy Any' to 'Flappy Mascot'

feat: Replace bird with tux as default mascot

feat: Customizable game title on start screen

feat: Introduce 'custom/' folder and allow customization of all images from 'assets/', see 'custom/README.md' for further details

chore: Ensure approriate copyright holder information are set

feat: Whitelabel intro screen

feat: Change default bird from blue to yellow

feat: Remove random bird selection, use 'bird-sprite.png' by default

feat: Make blue bird the default, move red and yellow to new 'alternative' sub-folder

docs: Initial version of the Readme file added

fix: Assets license information adjusted to correct copyright holder

chore: Minor change to game description in manifest

fix: Add missing favicon image including license information

feat: Add reuse software and spdx compliant license header and information to each file

feat: Reuse Software init and License move to subfolder