Bug Fixed: Added task name validation

[divya-nshi]

Issue Fixed: #149 Added a validation to the task name before adding the task to prevent tasks with empty string being added

Description

Added a validation check before adding the task to the list of tasks

 if(currentTask.trim().length == 0) setError('Please enter a non empty title!')

This change introduced as to validate the title after trimming to additional spaces and then checking if the name is a valid string thus preventing any unwanted spaces to be accepted as a valid string name

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works

Screenshots:

[netlify[bot]]

✅ Deploy Preview for coffeetasks ready!

Name	Link
🔨 Latest commit	647c2d1f15668aa5848dc7fc5e699bf37295c23c
🔍 Latest deploy log	https://app.netlify.com/sites/coffeetasks/deploys/63503a8e8a5e4700080a36c1
😎 Deploy Preview	https://deploy-preview-150--coffeetasks.netlify.app/
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[SauveJeanLuc]

@divya-nshi join #62

[divya-nshi]

@SauveJeanLuc yep done:)