Add cosmic-speech-to-text and cosmic-keepass applets

[raph-ael]

Summary

• cosmic-speech-to-text — Speech-to-text panel applet. Record voice, transcribe via Mistral/OpenAI/local whisper.cpp, type into any app.
• cosmic-keepass — KeePass password manager panel applet. Search, copy, and manage passwords from .kdbx databases.

Repos:

• https://github.com/raph-ael/cosmic-speech-to-text
• https://github.com/raph-ael/cosmic-keepass