Fixes these issues:

* The flagg views are not updated with the new adminbar component.
* Staff flagged view are not included in the main menu.
* Unflagging submissions did not work in the user and staff flagged
views, only on dashboard.
* Staff flagged filter was missing from new all-beta view.

Documentation overhaul - Fixing formatting issues, autodoc implementation, and added variables for versions. (#3734)

Closes #3639. 

This is a bit of an overhaul of the docs to make them more
easy to utilize. This changes include:
- Removal of overhanging public aspects of the documentation
- Reformatting of terminal commands to allow for easy copy & pasting
- Updating points of contact
- Screenshot Updates
- Automated code API documentation. [Google's docstring
style](https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings)
should be used.
- Added variables for things like software versions & packages.
- Unless python & node version are manually specified, when docs are
built these will be pulled from
[`.nvmrc`](https://github.com/HyphaApp/hypha/blob/main/.nvmrc) &
[`.python-version`](https://github.com/HyphaApp/hypha/blob/main/.python-version)
- Consolidated the production and development guides into one location
(both under `Setup` rather than one under `Getting Started` and one
under `Setup`), and updated them to be similar to one another.
- Added different steps for getting Hypha development deployed under
multiple OSs

The images are linked relative to page now. This prevents the mkdocs
warnings and also let these images render itself nicely inside the
editor or github interface.

This way of referencing also helps for future if the docs get deployed
to a path instead of a top-level domain

Fixes #3430

- [x] Simplified code
- [x] Use postgres FTS search
- [x] Improve UX for filters
- [x]  Improve submission listing
- [x] Add filter for submission date, OTF have asked about this.
- [x] Add submission ID search, see
https://github.com/HyphaApp/hypha/pull/3294
- [x]   Make sure the batch actions are working 
- [x]   Permissions check for batch actions
- [x] Ensure search index works after submissions is updated
- [x] ~Integrate Django messages framework with htmx responses~ (Not
needed)
- [x] [Fix Polynomial regular expression used on uncontrolled
data](https://github.com/HyphaApp/hypha/security/code-scanning/74

)
- [ ] make bulk update status working, currently it's hidden.

---------

Co-authored-by: Fredrik Jonsson <frjo@xdeb.org>

Run Django and docs preview server, and watch and compile frontend
changes in parallel.

This lets you quickly spin up and run everything in a single terminal.

- Add page last edited info on each page
- Update header - site title, repo name & icon
- Disable custom fonts, use system-fonts
- Add copyright info in footer
- Update navigation structure and behaviour
- Add source code view and edit buttons
- Refractor documentation