build: switch from yarn to npm to manage js dependencies and move js contents to root

yarn v1 is being deprecated and starts to have some issues

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

get_union_json.ts

@@ -0,0 +1,38 @@
+import fetch from "node-fetch";
+import fs from "fs";
+
+fetch(`http://localhost:4000/api`, {
+  method: "POST",
+  headers: { "Content-Type": "application/json" },
+  body: JSON.stringify({
+    variables: {},
+    query: `
+      {
+        __schema {
+          types {
+            kind
+            name
+            possibleTypes {
+              name
+            }
+          }
+        }
+      }
+    `,
+  }),
+})
+  .then((result) => result.json())
+  .then((result) => {
+    // here we're filtering out any type information unrelated to unions or interfaces
+    const filteredData = result.data.__schema.types.filter(
+      (type) => type.possibleTypes !== null
+    );
+    result.data.__schema.types = filteredData;
+    fs.writeFile("./fragmentTypes.json", JSON.stringify(result.data), (err) => {
+      if (err) {
+        console.error("Error writing fragmentTypes file", err);
+      } else {
+        console.log("Fragment types successfully extracted!");
+      }
+    });
+  });