fix: prepare for no-unused-vars

Oxlint's [no-unused-vars](oxc-project/oxc#4445) PR will
be merged soon. This PR updates `oxlint.json` to support some limitations of its
implementation.

- `@jsx` pragmas are not currently recognized as a usage, so `createElement` has
  been added to `varsIgnorePattern`
- `Fragment` imports used via `<></>` syntax is not recognized as a usage, so
  `Fragment` has been added to `varsIgnorePattern`

Note that there are still some unused variables and catch parameters that, when
`no-unused-vars` gets merged, will cause lint CI to fail.

oxlint.json

@@ -10,7 +10,8 @@
       2,
       {
         "args": "none",
-        "varsIgnorePattern": "^h|React$"
+        "caughtErrors": "none",
+        "varsIgnorePattern": "^h|React|createElement|Fragment$"
       }
     ],
     "typescript/no-namespace": 0,