0.8 - Speech To Text service

Discussion about a new logo is happening over at #74, you may want to take a look ;-)

New

• Add Speech To Text service: press the microphone button in various applications to trigger Dicio's on-device Speech To Text (powered by Vosk), or just use it for dictation #100 #109 #111 (thank you @nebkrid!)
• [Current time] Add current time skill #91 #94 (thank you @drew-sinha!)
• [Telephone] Add French and Russian translations #88 #71 (thank you @ioctl-user, @MXC48, @BrightDV!)
• [Timer] Add French and Russian translations, but they do not show up because dicio-numbers does not support them yet

Fixed

• [Vosk] Fix crashes when starting the model download on older Android devices due to missing external storage permission #110

Development

• Improve the README section explaining how to create a skill #90 (thank you @drew-sinha!)
• Use the same theme in the whole app and deduplicate some code