Redox accessibility (a11y)

This is a tracking issue for implementing accessibility in Redox. Please add to it as currently only screen readers are covered.

• Implement a TTS, preferably espeak-ng
• Implement a higher-level TTS interface, such as speech-dispatcher
• Investigate and implement the kernel-side support for a terminal-only screen reader like Speakup
• Implement a terminal screen reader like Speakup
• Investigate the porting of brltty
• Port an Orbital-related UI accessibility toolkit which can expose the accessibility tree
• Port a screen reader like Orca
• Ensure that the Cosmic desktop interface has a proper accessibility tree exposed