feat(cat-voices): Add CIP-39 seed phrase utility

[apskhem]

Description

Added a CIP-39 seed phrase utility including the SeedPhrase class and its unit tests.

The implementation requires to add a new linting rule implementation_imports as it needs to import the BIP-39 word list from internal of the bip39 package.

Related Issue(s)

Closes #812

Please confirm the following checks

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

[github-actions]

✅ Test Report | ${\color{lightgreen}Pass: 221/221}$ | ${\color{red}Fail: 0/221}$ |

[damian-molinski]

lgtm

[dtscalac]

lgtm