✨ create oauth login

Create authentication with oAuth using a third-party vendor. Currently, only GitHub is available, but more will be added
in the future.

src/modules/auth/services/githubCallback.service.ts

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+import { AppError } from "../../../helpers/error/instances/app";
+import { githubProvider } from "../providers/github.provider";
+
+export const githubCallbackService = async (code: string) => {
+  try {
+    const github = githubProvider();
+    const tokens = await github.validateAuthorizationCode(code);
+    const accessToken = tokens.accessToken();
+    const userdata = await fetch("https://api.github.com/user", {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+      },
+    });
+    const useremail = await fetch("https://api.github.com/user/emails", {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+      },
+    });
+
+    return {
+      userdata: await userdata.json(),
+      useremail: await useremail.json(),
+    };
+  } catch (error) {
+    return new AppError(500, "Authentication service error", error);
+  }
+};

src/modules/auth/services/githubRequest.service.ts

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+import * as arctic from "arctic";
+import { githubProvider } from "../providers/github.provider";
+import { AppError } from "../../../helpers/error/instances/app";
+
+export const githubRequestService = async () => {
+  try {
+    const github = githubProvider();
+    const state = arctic.generateState();
+    const scopes = ["user:email"];
+    const url = github.createAuthorizationURL(state, scopes);
+
+    return url;
+  } catch (error) {
+    throw new AppError(500, "Oops! something happening", error);
+  }
+};