Prepare for Remix future changes

[raducristianpopa]

⚠️ REMIX FUTURE CHANGE: The behaviors of 'CatchBoundary' and 'ErrorBoundary' are changing in v2. You can prepare for this change at your convenience with the 'v2_errorBoundary' future flag. For instructions on making this change see https://remix.run/docs/en/v1.15.0/pages/v2#catchboundary-and-errorboundary
⚠️ REMIX FUTURE CHANGE: APIs that provide 'formMethod' will be changing in v2. All values will be uppercase (GET, POST, etc.) instead of lowercase (get, post, etc.) You can prepare for this change at your convenience with the 'v2_normalizeFormMethod' future flag. For instructions on making this change see https://remix.run/docs/en/v1.15.0/pages/v2#formMethod
⚠️ REMIX FUTURE CHANGE: The route 'meta' export signature is changing in v2. You can prepare for this change at your convenience with the 'v2_meta' future flag. For instructions on making this change see https://remix.run/docs/en/v1.15.0/pages/v2#meta
⚠️ REMIX FUTURE CHANGE: The 'serverModuleFormat' config default option will be changing in v2 from 'cjs' to 'esm'. You can prepare for this change by explicitly specifying 'serverModuleFormat: 'cjs''. For instructions on making this change see https://remix.run/docs/en/v1.16.0/pages/v2#servermoduleformat
⚠️ REMIX FUTURE CHANGE: The route file convention is changing in v2. You can prepare for this change at your convenience with the 'v2_routeConvention' future flag. For instructions on making this change see https://remix.run/docs/en/v1.15.0/pages/v2#file-system-route-convention

We should also add a typecheck command to the project, and update the Github Action to call it.
Typescript compilation should pass since v2: remix-run/remix#4371