Implement dataset page v0.1 + Home improvements (#892)

* [examples/openspending][xl]: implement dataset page v0.1, add pagination to the datasets grid

* [examples/openspending][m] - fix build + add tests

---------

Co-authored-by: Luccas Mateus de Medeiros Gomes <luccasmmg@gmail.com>

examples/openspending/package-lock.json

@@ -9,6 +9,7 @@
       "version": "0.1.0",
       "dependencies": {
         "@githubocto/flat-ui": "^0.14.1",
+        "@heroicons/react": "^2.0.18",
         "@octokit/plugin-throttling": "^5.2.2",
         "@types/flexsearch": "^0.7.3",
         "@types/node": "18.16.0",
@@ -1622,6 +1623,14 @@
         "object-assign": "^4.1.1"
       }
     },
+    "node_modules/@heroicons/react": {
+      "version": "2.0.18",
+      "resolved": "https://registry.npmjs.org/@heroicons/react/-/react-2.0.18.tgz",
+      "integrity": "sha512-7TyMjRrZZMBPa+/5Y8lN0iyvUU/01PeMGX2+RE7cQWpEUIcb4QotzUObFkJDejj/HUH4qjP/eQ0gzzKs2f+6Yw==",
+      "peerDependencies": {
+        "react": ">= 16"
+      }
+    },
     "node_modules/@humanwhocodes/config-array": {
       "version": "0.11.8",
       "resolved": "https://registry.npmjs.org/@humanwhocodes/config-array/-/config-array-0.11.8.tgz",