Rework PSRAM detection (#270)

Author: josesimoes

README.md

@@ -158,6 +158,8 @@ To show the details of the ESP32 device connected to COM31.
 nanoff --platform esp32 --serialport COM31 --devicedetails 
 ```
 
+Optionally an extra parameter `--checkpsram` can be passed, which forces the detection of PSRAM availability.
+
 ### Deploy a managed application to an ESP32 target
 
 To deploy a managed application to an ESP32_PSRAM_REV0 target connected to COM31.

README.zh-cn.md

@@ -138,6 +138,8 @@ nanoff --update --target KALUGA_1 --serialport COM31 --clrfile "C:\nf-interprete
 nanoff --platform esp32 --serialport COM31 --devicedetails 
 ```
 
+可选地，可以传递额外的参数 `--checkpsram`，它会强制检测PSRAM的可用性。
+
 ### 将托管应用程序部署到ESP32设备  
 
 将托管应用程序部署到连接到COM31的ESP32_PSRAM_REV0设备上。