Migrate Mantine to Version 7

[otobot1]

Is your feature request related to a problem? Please describe.
A new major version of Mantine has been released.

Describe the solution you'd like
There are a lot of breaking changes, but the sooner we update the less code we will need to rewrite. The biggest changes are the removal of the createStyles hook in favour of CSS modules, as well as some other styling changes. We will need to simultaneously update our code, all Mantine packages, and MantineDataTable.

Describe alternatives you've considered
N/A. This is required, but it can be pushed to a later milestone if needed.

Additional context
MantineDataTable will need to be updated at the same time, but may take a few weeks to be updated as per this comment. MantineDataTable v7 has been released.

[grahampcharles]

Do you have a development branch? Or how do you want help to be provided?

[ShouvikGhosh2048]

@grahampcharles

Hi, I'm a contributor to this repository. I contribute by making a pull request to the main branch.

[otobot1]

@grahampcharles

Hey there! Yeah like Shouvik said, just fork the project and create a branch off of main. Our contribution guidelines go into a bit more detail, and our readme has instructions for setting up your local dev environment.

[grahampcharles]

I mean, that makes sense for feature adds or bugfixes. But if you want help implementing a complete rewrite in order to support Mantine 7 seems like we would want a shared branch. Someone sets the target versioning in package.json and then we divide up the work? Having just done a Mantine 6->7 conversion, it's a lot of manually creating .module.css files and replacing createStyles calls. But I don't know the internals of this package well; maybe I'm missing something.

[otobot1]

I mean, that makes sense for feature adds or bugfixes. But if you want help implementing a complete rewrite in order to support Mantine 7 seems like we would want a shared branch. Someone sets the target versioning in package.json and then we divide up the work? Having just done a Mantine 6->7 conversion, it's a lot of manually creating .module.css files and replacing createStyles calls. But I don't know the internals of this package well; maybe I'm missing something.

Ah yeah that makes sense - I'm still pretty new to being a maintainer. I'll try and get that setup this weekend, but a lot of our styling isn't on main yet anyways (see #563). At the moment we're pretty focused on meeting our v0.1.0 milestone and getting the site launched, so Shouvik and I probably won't be touching this issue for a month or two.