BITAU-158 Add PasswordManagerSync local feature flag

[ahaisting-livefront]

🎟️ Tracking

https://livefront.atlassian.net/browse/BITAU-158

📔 Objective

The goal of this PR is to setup a local feature flag for password manager sync.

📸 Screenshots

N/A

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions[bot]]

Checkmarx One – Scan Summary & Details – 171d867f-821c-47fb-9215-f5ce35a070ee

No New Or Fixed Issues Found

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 2.31%. Comparing base (06d742b) to head (3c273ba). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #189 +/- ## ===================================== Coverage 2.31% 2.31% ===================================== Files 90 90 Lines 4357 4357 Branches 500 500 ===================================== Hits 101 101 Misses 4239 4239 Partials 17 17 ```

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[ahaisting-livefront]

Thanks, @david-livefront and @SaintPatrck !