[UPM-1303]/evgeniy/livechat name and email not populated

[yauheni-deriv]

Changes:

1. removed unnecessary dependancy from package.json (@livechat/customer-sdk) as it is not used.
2. refactored the logic to initialise livechat, as previously it was in the hook which is called in ui component.
3. remove legacy LC_API
4. added the logic to hide livechat widget during log out and log in, as the state inside livechat (name and email) updates only with closing and reopening livechat
5. make initialisation only when remote config flag is true and client store is initialised
6. hide small red LC widget on responsive, as it is not expected to appear (it appears now when you refresh the page with opened livechat)
7. modified whatsapp component to be more reusable
8. added hooks for initialisation of livechat and to check when it is ready
9. added types to livechat

[vercel]

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Name	Status	Preview	Updated (UTC)
deriv-app	✅ Ready (Inspect)	Visit Preview	Sep 23, 2024 11:57am

[github-actions]

A production App ID was automatically generated for this PR. (log)

• PR: [UPM-1303]/evgeniy/livechat name and email not populated #16676
• URLs:
  • w/ App ID + Server: https://deriv-app-git-fork-yauheni-deriv-livechat-upm-1303-namea-9f4db1.binary.sx?qa_server=red.derivws.com&app_id=23851
  • Original: https://deriv-app-git-fork-yauheni-deriv-livechat-upm-1303-namea-9f4db1.binary.sx
• App ID: 23851

Click here to copy & paste above information.

- **PR**: [https://github.com/binary-com/deriv-app/pull/16676](https://github.com/binary-com/deriv-app/pull/16676)
- **URLs**:
    - **w/ App ID + Server**: https://deriv-app-git-fork-yauheni-deriv-livechat-upm-1303-namea-9f4db1.binary.sx?qa_server=red.derivws.com&app_id=23851
    - **Original**: https://deriv-app-git-fork-yauheni-deriv-livechat-upm-1303-namea-9f4db1.binary.sx
- **App ID**: `23851`

[github-actions]

🚨 Lighthouse report for the changes in this PR:

Category	Score
🔺 Performance	30
🟧 Accessibility	70
🟢 Best practices	92
🟧 SEO	77
🟧 PWA	78

Lighthouse ran with https://deriv-app-git-fork-yauheni-deriv-livechat-upm-1303-namea-9f4db1.binary.sx/

[coveralls]

coverage: 52.425% (+0.04%) from 52.387%
when pulling 70bb92f on yauheni-deriv:livechat/upm-1303-name_and_email_not_populated
into 980d9bd on binary-com:master.

[sonarcloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud