feat: add GitHub provider documentation and CIS v1.0.0 compliance (#6116)

Co-authored-by: MrCloudSec <hello@mistercloudsec.com>
Co-authored-by: Andoni A. <14891798+andoniaf@users.noreply.github.com>

docs/tutorials/github/authentication.md

@@ -0,0 +1,44 @@
+# GitHub Authentication
+
+Prowler supports multiple methods to [authenticate with GitHub](https://docs.github.com/en/rest/authentication/authenticating-to-the-rest-api). These include:
+
+- **Personal Access Token (PAT)**
+- **OAuth App Token**
+- **GitHub App Credentials**
+
+This flexibility allows you to scan and analyze your GitHub account, including repositories, organizations, and applications, using the method that best suits your use case.
+
+## Supported Login Methods
+
+Here are the available login methods and their respective flags:
+
+### Personal Access Token (PAT)
+Use this method by providing your personal access token directly.
+
+```console
+prowler github --personal-access-token pat
+```
+
+### OAuth App Token
+Authenticate using an OAuth app token.
+
+```console
+prowler github --oauth-app-token oauth_token
+```
+
+### GitHub App Credentials
+Use GitHub App credentials by specifying the App ID and the private key.
+
+```console
+prowler github --github-app-id app_id --github-app-key app_key
+```
+
+### Automatic Login Method Detection
+If no login method is explicitly provided, Prowler will automatically attempt to authenticate using environment variables in the following order of precedence:
+
+1. `GITHUB_PERSONAL_ACCESS_TOKEN`
+2. `OAUTH_APP_TOKEN`
+3. `GITHUB_APP_ID` and `GITHUB_APP_KEY`
+
+???+ note
+  Ensure the corresponding environment variables are set up before running Prowler for automatic detection if you don't plan to specify the login method.