PM-11217: Update colors to new design spec

[matt-livefront]

🎟️ Tracking

PM-11217

📔 Objective

Updates the colors across the app to use the updated colors from the design style guide.

The biggest changes here include:

• More semantic colors (primaryBitwarden has been replaced with iconSecondary, textInteraction, etc).
• Swapped background colors. Previously backgroundSecondary was used as the background color for most views. This has been updated to be backgroundPrimary. And backgroundSecondary is primarily used as the cards and element background color.

There's still a few "Legacy" colors in the asset catalog which didn't have a direct mapping to the new style guide and will be removed/replaced in future PRs as components that use these colors are updated (e.g. loading screen, accessory buttons, etc).

📸 Screenshots

See snapshots.

⏰ 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 – fbb0b6b7-73f5-4d37-a95f-84ef443032d1

No New Or Fixed Issues Found

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 97.79412% with 3 lines in your changes missing coverage. Please review.

Project coverage is 88.76%. Comparing base (a674339) to head (744a96c). Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
.../UI/Auth/ProfileSwitcher/ProfileSwitcherItem.swift	0.00%	1 Missing :warning:
...d/UI/Auth/ProfileSwitcher/ProfileSwitcherRow.swift	80.00%	1 Missing :warning:
...pplication/Views/BitwardenMultilineTextField.swift	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #968 +/- ## ======================================= Coverage 88.76% 88.76% ======================================= Files 638 638 Lines 40082 40087 +5 ======================================= + Hits 35580 35585 +5 Misses 4502 4502 ```

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