Fix : Notification Toast will be displayed on clicking "Integrate with github"

[Mhammad-riyaz]

Description 📣

Fixed the bug where the "Integrate with GitHub" button in the Secret Scanning tab failed silently. Added a user feedback toast message to inform users of failures.

Type ✨

• [x] Bug fix
• [ ] New feature
• [ ] Improvement
• [ ] Breaking change
• [ ] Documentation

Tests 🛠️

    const generateNewIntegrationSession = async () => {
      const session = await createNewIntegrationSession(String(localStorage.getItem("orgData.id")));
      if(session){
        router.push(
          `https://github.com/apps/infisical-radar/installations/new?state=${session.sessionId}`
        );
      }else{
        createNotification({text : "Secret scanning is temporarily unavailable.",type:"error"});
      }
    };

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• [x] I have read the contributing guide, agreed and acknowledged the code of conduct. 📝