[PM-32810] feat: Add Bank Account item detail view

[SaintPatrck]

🎟️ Tracking

PM-32810

Stacked child: #6877

📔 Objective

Surface the read-only Bank Account detail screen so existing Bank Account ciphers can be opened from any list and have their fields copied. This PR is the detail-screen slice of the original Bank Account view-only feature; the vault-list, item-listing, and search surfaces follow in the stacked child PR.

📸 Screenshots

Figma: https://www.figma.com/design/WjD06w9dFlA67Ba27d1OSu/Dev-Ready--Bitwarden-Android?node-id=40015437-424812&t=I5hzVA3NUII5Fx6B-4

Actual:
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[github-actions]

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[codecov]

Codecov Report

❌ Patch coverage is 97.89227% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.64%. Comparing base (01859be) to head (bfcd3f6).

Files with missing lines	Patch %	Lines
...warden/ui/vault/feature/item/VaultItemViewModel.kt	94.31%	0 Missing and 5 partials ⚠️
.../vault/feature/item/VaultItemBankAccountContent.kt	99.29%	1 Missing and 1 partial ⚠️
...bitwarden/ui/vault/feature/item/VaultItemScreen.kt	88.88%	0 Missing and 1 partial ⚠️
...ui/vault/feature/item/util/CipherViewExtensions.kt	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6875      +/-   ##
==========================================
+ Coverage   85.42%   85.64%   +0.22%     
==========================================
  Files         843      846       +3     
  Lines       60209    60555     +346     
  Branches     8817     8851      +34     
==========================================
+ Hits        51436    51865     +429     
+ Misses       5755     5656      -99     
- Partials     3018     3034      +16     

Flag	Coverage Δ
app-data	17.54% <0.00%> (-0.13%)	⬇️
app-ui-auth-tools	19.91% <0.00%> (-0.15%)	⬇️
app-ui-platform	15.73% <0.00%> (-0.12%)	⬇️
app-ui-vault	26.12% <97.89%> (+0.54%)	⬆️
authenticator	6.52% <0.00%> (-0.02%)	⬇️
lib-core-network-bridge	4.18% <0.00%> (-0.02%)	⬇️
lib-data-ui	1.00% <0.00%> (-0.02%)	⬇️

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