added fields list page, left out the harvest plan table as i would like to re-do and this is a good oppurtunity (if people want it)

src/pages/Fields.tsx

@@ -0,0 +1,14 @@
+import React from "react";
+import PageContainer from "./PageContainer";
+import FieldList from "field/FieldList";
+import { Box } from "@mui/material";
+
+export default function Fields() {
+  return (
+    <PageContainer>
+      <Box padding={2}>
+        <FieldList />
+      </Box>
+    </PageContainer>
+  );
+}