Upgrade Eslint to v9

[menghif]

Fixes #689

This PR upgrades Eslint to v9 and moves to a flat config.

All plugins are now up to date and compatible with the new Eslint flat config. The exception was eslint-plugin-react-hooks where I had to use the latest rc version (facebook/react#28313 (comment)).

I started the upgrade process with the configuration migrator and then went through each plugin and used the recommended configuration setup found in the docs (while making sure all the original chatcraft custom configurations are kept).

[humphd]

Excellent. Those catch(err) issues could be converted to not require the disable.

[humphd]

Cloudflare build fails like so:

16:56:24.488 | > chatcraft.org@0.0.0 build /opt/buildhome/repo
-- | --
16:56:24.488 | > tsc && vite build
16:56:24.488 |  
16:56:32.623 | src/components/Sidebar/SidebarDesktop.tsx(1,15): error TS2305: Module '"@chakra-ui/react"' has no exported member 'keyframes'.
16:56:32.658 | ELIFECYCLE  Command failed with exit code 2.
16:56:32.690 | Failed: Error while executing user command. Exited with error code: 2
16:56:32.700 | Failed: build command exited with code: 1
16:56:33.704 | Failed: error occurred while running build command

[cloudflare-workers-and-pages]

Deploying chatcraft-org with    Cloudflare Pages

Latest commit:	6ff346a
Status:	✅  Deploy successful!
Preview URL:	https://3bde30ed.console-overthinker-dev.pages.dev
Branch Preview URL:	https://issue-689.console-overthinker-dev.pages.dev

View logs

[menghif]

Cloudflare build fails like so:

16:56:24.488 | > chatcraft.org@0.0.0 build /opt/buildhome/repo
-- | --
16:56:24.488 | > tsc && vite build
16:56:24.488 |  
16:56:32.623 | src/components/Sidebar/SidebarDesktop.tsx(1,15): error TS2305: Module '"@chakra-ui/react"' has no exported member 'keyframes'.
16:56:32.658 | ELIFECYCLE  Command failed with exit code 2.
16:56:32.690 | Failed: Error while executing user command. Exited with error code: 2
16:56:32.700 | Failed: build command exited with code: 1
16:56:33.704 | Failed: error occurred while running build command

This is because I upgraded @chakra-ui/react without noticing. I reverted it now!

[humphd]

Excellent