Flutter V2 SDK Docs Update

[Kushal7788]

Description

Updated Flutter SDK Docs for V2 Upgrade

Type of change

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

Checklist:

• [x] I have read and agree to the Code of Conduct.
• [x] I have signed the Contributor License Agreement (CLA).
• [x] I have considered the Security Policy.
• [x] I have self-reviewed and tested my code.
• [x] I have updated documentation as needed.
• [x] I agree to the project's custom license.

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Name	Status	Preview	Comments	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 11, 2024 11:50am

[AbdulRashidReshamwala]

@Kushal7788 install and example should also have a subpage of their own

[AbdulRashidReshamwala]

also quick start page for flutter is broken check the preview https://docs-git-flutter-v2-sdk-docs-questbook-inc.vercel.app/flutter/quickstart

[AbdulRashidReshamwala]

Why is this the first section the user see when he opens the example page this should only be shown when the user comes to the link opening part

[AbdulRashidReshamwala]

can we add some more context on why we are doing this a couple of lines of explanation is fine

[AbdulRashidReshamwala]

Explain what url we are launching why this is required etc

[AbdulRashidReshamwala]

The example has dotenv setup still we are showing placeholder values for APP_ID etc. Example should also show fetching this value from env

[AbdulRashidReshamwala]

Advance configuration has a lot of different styles and warnings can we simplify it a bit more looks very distracting