(BREAKING CHANGES) Refactoring MobileAds API to v3.0.0

[gumaciel]

Is your feature request related to a problem? If so, please describe.

This change intends to change many of the plugins in all aspects, in order to make the plugin more dynamic and easy to use, it is necessary almost completely to redo the plugin to meet the use of mediation.

⚠️WARNING⚠️:

• No long support for Godot 3 due to (BREAKING CHANGES) Refactoring MobileAds API to v3.0.0 godot-admob-plugin#82
• Next tag release will be v3.0.0

What feature or improvement would you like to see?

✅GOALS✅

• Create an Interface of MobileAds class with Objective-C with the most important methods used on AdMob.
  Example:

void PoingGodotAdMob::initialize() {
    [[GADMobileAds sharedInstance] startWithCompletionHandler:^(GADInitializationStatus *_Nonnull status)
    {
        Dictionary dictionary = [ObjectToGodotDictionary convertGADInitializationStatusToDictionary:status];
        emit_signal("on_initialization_complete", dictionary);
    }];
}

void PoingGodotAdMob::_bind_methods() {
    ADD_SIGNAL(MethodInfo("on_initialization_complete", PropertyInfo(Variant::DICTIONARY, "initialization_status_dictionary")));

    ClassDB::bind_method(D_METHOD("initialize"), &PoingGodotAdMob::initialize);
};

• [FEATURE] Make it mandatory to use Cocoapods for better distribution of the build #30
• Use CocoaPods to build the project Mediations
• Build on Terminal
• Build on Xcode
• Create PoingGodotAdMob class #46
• Create GodotDictionaryToObject class #47
• Create ObjectToGodotDictionary class #48
• Create PoingGodotAdMobAdSize class
• Create PoingGodotAdMobAdView class
• Create PoingGodotAdMobInterstitialAd class #52
• Create PoingGodotAdMobRewardedAd class #53
• Create PoingGodotAdMobRewardedInterstitialAd class #56
• Create PoingGodotAdMobConsentInformation class #57
• Create PoingGodotAdMobUserMessagingPlatform class #58
• Create mediations adapterAdColony #49
• Create mediations adapterMeta #59
• Create mediations adapterVungle #60
• Manage plugin distribution (pods, build and CI/CD) #61
• Add proper logs
• Update Documentation #62

Additional context

No response