Refactor: move package into a monorepo

[ahmedAlaaInstabug]

Description of the change

Create monorepo for instabug-flutter

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Related issues

JIRA ID : MOB-16329

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests

Code review

• This pull request has a descriptive title and information useful to a reviewer
• Issue from task tracker has a link to this pull request

[InstabugCI]

Coverage Report

Label	Coverage	Status
instabug_flutter	80.4%	✅

Generated by 🚫 dangerJS against 4bbafb0

[a7medev]

Amazing effort on this @ahmedAlaaInstabug 👏🏼❤️

I feel like we can rename packages/Instabug-Flutter to the actual pub.dev package name packages/instabug_flutter, we can do the same for the rest of the packages once added as well.
An alternative would be to rename it to core and the rest would be dio, http, flutter_modular etc.
What do you think?