fix: beagle helpers page and add beagle grpc tutorials (#611)

* move overview to beagle helpers root page

* delete overview from beagle helpers android page

* delete overview from beagle helpers ios page

* Create overview.md

* Create overview.md

* Create _index.md

* Create _index.md

* create a beagle gRPC tutorial

* Update content/en/get-started/using-beagle-helpers/backend/_index.md

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* fix grammaly

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* add linux and mac run guide

* add portuguese page

* fix How Beagle gRPC works

* fix portuguese gramally

* fix Portuguese grammar

* Update content/en/get-started/using-beagle-helpers/backend/beagle-grpc.md

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* fix How Beagle gRPC works - grammar

* chore: Add android doc

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* feat: Beagle gRPC iOS

* fixes in grpc ios pages

* beagle grpc ios pt

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* fix beagle grpc backend versions

* fix static version on beagle grpc for android

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* grpc for beagle web

* add @zup-it/ to the package name

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* english fixes

* move gRPC content from beagle helpers to ressources

* fix gRPC pages

* fix gRPC pages

* fix gRPC pages

* fix iOS gRPC tutorial on backend reference shortcode

* fix grpc github repo reference on grpc backend tutorials

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content/en/resources/gRPC/_index.md

@@ -0,0 +1,6 @@
+---
+title: gRPC
+weight: 2
+description: >-
+  This section provide some backend libs that will help you to use Beagle with gRPC.
+---

content/en/resources/gRPC/beagle-grpc-android.md

@@ -0,0 +1,107 @@
+---
+title: Beagle gRPC for Android
+weight: 16
+description: 'Here you will find the **beagle-grpc-android** library to help you use gRPC in a project using Beagle in Android.
+This lib will hold almost all necessary configuration to add gRPC into a Beagle Android project.'
+---
+
+---
+
+![Maven Central](https://img.shields.io/maven-central/v/br.com.zup.beagle/beagle-grpc?color=green&label=Beagle-gRPC)
+![**Maven Central**](https://img.shields.io/maven-central/v/br.com.zup.beagle/android?label=Beagle)
+
+### Requirements
+
+<hr>
+
+Before you start to configure Beagle for your Android system, it’s important to check out if you have installed all the current versions of the following programs: ‌
+
+- JDK 8+ language
+- Android API level: at least 19 or higher
+- Kotlin 1.3+
+
+### Getting started
+
+<hr>
+
+This tutorial will configure Beagle from the Start.
+
+#### Step 1: Add a configuration on the Gradle file in your project:
+
+- `Add mavenCentral()` into the `All projects` block on your Project Gradle file(build.gradle)<br>
+
+```kotlin
+allprojects {
+    repositories {
+        google()
+        jcenter()
+        mavenCentral()
+    }
+}
+```
+
+#### Step 2: Add Kotlin Kapt plugin and 3 dependencies on your application dependency manager (gradle.gradle)<br>
+
+![Maven Central](https://img.shields.io/maven-central/v/br.com.zup.beagle/beagle-grpc?color=green&label=Beagle-gRPC)
+![Maven Central](https://img.shields.io/maven-central/v/br.com.zup.beagle/android?label=Beagle)
+
+- Add the packagingOptions code block to the build.gradle file, as in the example below.
+
+- _The version numbers listed below may have been updated. Please check the actual versions on the tags above:_
+
+```kotlin
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+    id 'kotlin-android-extensions'
+    id 'kotlin-kapt'
+}
+
+android {
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8
+    }
+
+    packagingOptions {
+        pickFirst 'META-INF/LICENSE.md'
+        pickFirst 'META-INF/LICENSE-notice.md'
+    }
+}
+
+dependencies {
+    kapt "br.com.zup.beagle:android-processor:${beagleVersion}"
+    implementation "br.com.zup.beagle:beagle-grpc:${beagleVersion}"
+}
+```
+
+#### Step 3: Create an AppHttpClientFactory
+
+- This class will be responsible to provide the `HttpClient` that will be used by Beagle to perform requests.<br>
+
+```
+const val BASE_URL = "http://10.0.2.2:8080" // your gRPC host
+
+@BeagleComponent
+class AppHttpClientFactory: HttpClientFactory {
+    override fun create(): HttpClient {
+        return GrpcClient(BASE_URL, HttpClientDefault())
+    }
+}
+```
+
+Here, we are telling Beagle to use `GrpcClient` to perform network requests.<br><br>
+Let's look to the constructor params of `GrpcClient`: <br>
+
+- `grpcAddress`: Host of your gRPC server. Every request pointing to this host will be performed by `GrpcClient`.
+- `customHttpClient`: All requests made to another host will be performed by this `HttpClient`.
+
+Therefore, a request to `http://10.0.2.2:8080/foo` will be performed by `GrpcClient` and a request to another host, let's say, `http://127.0.1.1:5555/bar` will be performed by `HttpClientDefault`.
+<br>
+
+The `HttpClientDefault` implementation can be found at Beagle-Default lib.
+
+<hr>
+
+##### For more on Beagle: Please check our [Beagle](https://github.com/ZupIT/beagle) repository.
+
+##### For more on Beagle-Defaults: Please check our [Beagle-Default]({{< ref path="/get-started/using-beagle-helpers/android/beagle-defaults" lang="en" >}}) documentation.