feat(cat-voices): Add simple key derivation from seed phrase

[apskhem]

Description

Added a simple key derivation from a 12-word seed phrase.

Related Issue(s)

Closes #876

Please confirm the following checks

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream module

[github-actions[bot]]

✅ Test Report | ${\color{lightgreen}Pass: 260/260}$ | ${\color{red}Fail: 0/260}$ |