Add interactive roadmap error handling and loading

components/roadmap/roadmap-error.tsx

@@ -0,0 +1,26 @@
+import { RoadmapType } from '../../lib/roadmap';
+import { Container, Heading, Link, Text } from '@chakra-ui/react';
+import siteConfig from '../../content/site.json';
+
+type RoadmapProps = {
+  roadmap: RoadmapType;
+};
+
+export function RoadmapError(props: RoadmapProps) {
+  const { roadmap } = props;
+
+  return (
+    <Container
+      bg={'red.600'}
+      maxW={'container.md'}
+      position="relative"
+      mt="50px"
+      p='20px'
+      rounded='5px'
+      color='white'
+    >
+      <Heading mb='4px' size='md'>Oops! There's an error</Heading>
+      <Text>Try refreshing or <Link target='_blank' fontWeight={700} textDecoration={'underline'} fontSize='14px' href={siteConfig.url.issue}>report a bug</Link> and use the <Link fontWeight={700} textDecoration={'underline'} href={`/${roadmap.id}`}>non-interactive version</Link></Text>
+    </Container>
+  );
+}

components/roadmap/roadmap-loader.tsx

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+import { Container, Spinner } from '@chakra-ui/react';
+
+export function RoadmapLoader() {
+  return (
+    <Container
+      maxW={'container.md'}
+      position="relative"
+      mt="60px"
+      textAlign="center"
+    >
+      <Spinner
+        thickness="7px"
+        speed="0.65s"
+        emptyColor="gray.200"
+        color="gray.500"
+        size="xl"
+      />
+    </Container>
+  );
+}