Feat: #1243 Add drag & drop functionality to nav items & replace right items with dropdown

[frimpongopoku]

Summary / Highlights

• [X] Admins can now reorder navigation menu items by dragging and dropping.
• [X] Interaction items on the right have now been moved to a dropdown.

Both the dragging, and the dropdown feature are hidden under feature flags. By default, communities will have the old arrows(move up and and down) on the left, with the add, edit and remove buttons on the right side of the nav items.

How to enable dragging for a community

Create a feature flag with name Draggable Navigation Items, and add your community.

How to enable dropdown feature for a community

Create a feature flag with name Dropdown View for Nav Items, and ad your community

DEMO

https://github.com/user-attachments/assets/d5ac3306-e886-40b0-85c8-7b74281d655e

Details (Give details about what this PR accomplishes, include any screenshots etc.)

Testing Steps (Provide details on how your changes can be tested)

Requirements

• [x] I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• [x] I've tested my changes manually.
• [ ] I've added unit tests to my PR.

Transparency (Project board)

• [x] I've given my PR a meaningful title.
• [x] I linked this PR to the relevant issue.
• [x] I moved the linked issue from the "Sprint backlog" to "In progress" when I started this.
• [ ] I moved the linked issue to "QA Verification" now that it is ready to merge.

What kind of change does this PR introduce? (check at least one)

• [ ] Bugfix
• [x] Feature
• [ ] Performance improvement
• [ ] Feature removal
• [ ] Code style update
• [ ] Refactor
• [ ] Docs
• [ ] Build-related changes
• [ ] Other, please describe:

Does this PR introduce a breaking change? (check one)

• [ ] Yes
• [x] No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• [x] It's submitted to the dev branch or to a feature branch, not the main branch
• [x] When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
• [ ] All tests are passing: Contributing Guidelines
• [ ] New/updated tests are included

Other information: Any otherthing we need to know