Beta Release 0.5.0 (#3)

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Co-authored-by: PayPalServerSDKs <server-sdks@paypal.com>

doc/logging-configuration-builder.md

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+
+# LoggingConfigurationBuilder Class
+
+Represents the logging configurations for API calls. Create instance using `LoggingConfigurationBuilder::init()`
+
+## Methods
+
+| Name | Parameter Type | Description |
+|  --- | --- | --- |
+| logger | `LoggerInterface` | Takes in your custom implementation of the Psr\Log\LoggerInterface.php. **Default Implementation : `ConsoleLogger`** |
+| level | `string(LogLevel)` | Defines the log message severity mentioned in Psr\Log\LogLevel.php (e.g., DEBUG, INFO, etc). **Default : `logLevel::INFO`** |
+| maskSensitiveHeaders | `bool` | Toggles the global setting to mask sensitive HTTP headers in both requests and responses before logging, safeguarding confidential data. **Default : `true`** |
+| requestConfiguration | [`RequestLoggingConfigurationBuilder`](request-logging-configuration-builder.md) | The logging configurations for an API request. |
+| responseConfiguration | [`RequestLoggingConfigurationBuilder`](response-logging-configuration-builder.md) | The logging configurations for an API response. |
+
+## Usage Example
+
+### Client Initialization with Custom Logger
+
+In order to provide custom logger, any implementation of the `Psr\Log\LoggerInterface` can be used so that you can override the `log` behavior and provide its instance directly in the SDK client initialization.
+
+The following example uses `Monolog\Logger` implementation of `Psr\Log\LoggerInterface` for PaypalServerSDKClient initialization.
+
+```php
+<?php
+
+use PaypalServerSDKLib\PaypalServerSDKClientBuilder;
+use PaypalServerSDKLib\Logging\LoggingConfigurationBuilder;
+use PaypalServerSDKLib\Logging\RequestLoggingConfigurationBuilder;
+use PaypalServerSDKLib\Logging\ResponseLoggingConfigurationBuilder;
+use Psr\Log\LogLevel;
+use Monolog\Logger;
+use Monolog\Handler\StreamHandler;
+
+// create a log channel
+$logger = new Logger('PaypalServerSDK');
+$logger->pushHandler(new StreamHandler(__DIR__ . '/api_data.log'));
+
+// initialize the sdk client using this logger
+$client = PaypalServerSDKClientBuilder::init()
+    ->loggingConfiguration(
+        LoggingConfigurationBuilder::init()
+            ->logger($logger)
+            ->level(LogLevel::INFO)
+            ->requestConfiguration(RequestLoggingConfigurationBuilder::init()->body(true))
+            ->responseConfiguration(ResponseLoggingConfigurationBuilder::init()->headers(true))
+    )
+    ->build();
+```
+