[#324] Use Moya as the main Network Layer

[Shayokh144]

https://github.com/nimblehq/ios-templates/issues/324

What happened

Replace Alamofire with Moya as main network layer of the template.

Insight

• Remove Alamofire from Pod
• Add Moya in Pod
• Update networking code to use Moya
• Add comments for better readability
• Test this branch by creating a separate app from it
• Remove common RequestConfiguration as it is not needed, developers can create their own request configuration enum extending Moya's TargetType

Proof Of Work

• Created a demo app from this branch, request-response working fine

• Create different configurations independently

• Sample configuration 1:

• Sample configuration 2:

• Call using any configuration with any decodable type

• Write test with stubbed provider

[Shayokh144]

@blyscuit @ducbm051291 I have updated the PR, please take a look

[vnntsu]

@Shayokh144 we will have this initiative Replace-Network-Layer-with-Moya to work on before making the change to our ios templates. So I'll close this PR. cc: @nimblehq/ios-chapter