Make Github stars dynamic and improve database init (#5000)

I extracted the init database logic into its own file. 
You can now run it with yarn database:init.
Added database entry for GitHub stars. 

Do you want me to remove the init route or is it used for something else
?

---------

Co-authored-by: Ady Beraud <a.beraud96@gmail.com>
Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-website/src/github-sync/fetch-and-save-github-data.ts

@@ -0,0 +1,44 @@
+import { global } from '@apollo/client/utilities/globals';
+import { graphql } from '@octokit/graphql';
+
+import { fetchAssignableUsers } from '@/github-sync/contributors/fetch-assignable-users';
+import { fetchIssuesPRs } from '@/github-sync/contributors/fetch-issues-prs';
+import { saveIssuesToDB } from '@/github-sync/contributors/save-issues-to-db';
+import { savePRsToDB } from '@/github-sync/contributors/save-prs-to-db';
+import { IssueNode, PullRequestNode } from '@/github-sync/contributors/types';
+import { fetchAndSaveGithubStars } from '@/github-sync/github-stars/fetch-and-save-github-stars';
+
+export const fetchAndSaveGithubData = async () => {
+  if (!global.process.env.GITHUB_TOKEN) {
+    return new Error('No GitHub token provided');
+  }
+
+  console.log('Synching data..');
+
+  const query = graphql.defaults({
+    headers: {
+      Authorization: 'bearer ' + global.process.env.GITHUB_TOKEN,
+    },
+  });
+
+  await fetchAndSaveGithubStars(query);
+
+  const assignableUsers = await fetchAssignableUsers(query);
+  const fetchedPRs = (await fetchIssuesPRs(
+    query,
+    null,
+    false,
+    [],
+  )) as Array<PullRequestNode>;
+  const fetchedIssues = (await fetchIssuesPRs(
+    query,
+    null,
+    true,
+    [],
+  )) as Array<IssueNode>;
+
+  savePRsToDB(fetchedPRs, assignableUsers);
+  saveIssuesToDB(fetchedIssues, assignableUsers);
+
+  console.log('data synched!');
+};