[PM-6437] Implement admin password reset logic

[Hinton]

Type of change

- [ ] Bug fix
- [x] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

Implement cryptographic logic for admin password reset.

Before you submit

• Please add unit tests where it makes sense to do so

[bitwarden-bot]

Checkmarx One – Scan Summary & Details – cdf48410-d080-4e3e-81c6-ac227944bed3

No New Or Fixed Issues Found

[codecov]

Codecov Report

Attention: Patch coverage is 74.64789% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 59.50%. Comparing base (63b6a9e) to head (0765c94).

Files	Patch %	Lines
crates/bitwarden-uniffi/src/crypto.rs	0.00%	12 Missing ⚠️
crates/bitwarden/src/mobile/client_crypto.rs	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #631      +/-   ##
==========================================
+ Coverage   59.40%   59.50%   +0.10%     
==========================================
  Files         171      171              
  Lines       10345    10416      +71     
==========================================
+ Hits         6145     6198      +53     
- Misses       4200     4218      +18     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.