Update and rename README.txt to README.md

Author: halx99

README.txt README.mdREADME.txt renamed to README.md

@@ -1,33 +1,36 @@
-
-## Folder description
-
-- assets-dev: The plain resources for dev, debugging
-- assets: The encrypted resources for online or publish
-
-## Build and run
-
+
+## Folder description
+
+- assets-dev: The plain resources for dev, debugging
+- assets: The encrypted resources for online or publish
+
+## Build and run
+
 - Clone adxe(another cocos2d-x fork) and run setup.py in root of engine
 
 git clone https://github.com/adxeproject/adxe
 
-# Ensure install visual studio 2019/2022
-- Use cmake to build
-cmake -B build_x86 -A Win32 -DBUILD_EXTENSION_FAIRYGUI=OFF -DBUILD_EXTENSION_GUI=OFF
-cmake --build build_x86 --target HelloLua
-
+- Use cmake to build
+
+```bat
+REM Ensure visual studio 2019 or 2022 installed
+cmake -B build_x86 -A Win32 -DBUILD_EXTENSION_FAIRYGUI=OFF -DBUILD_EXTENSION_GUI=OFF
+cmake --build build_x86 --target HelloLua
+```
+
 - Open build_x86/HelloLua.sln, and press F5 to run, by default the vs debugging working directory is the encrypted folder `assets`,
  everything should be fine if the decrypt work well. 
-
-## Use a new key & ivec to encrypt resources
-
-- Method A:
-  - Delete file encrypt-cfg.xml and run do-encrypt.bat
-  
-- Method B:
-  - run command: "%XS_INSTDIR%\x-studio" -c -enc -nk -cfg=.\encrypt-cfg.xml -i=.\assets-dev -o=.\assets
-  
-- After reencrypt with new key, you needs change it at AppDelegate.cpp
-
-## For more usage of x-studio encrypt system, run follow command:
-
-"%XS_INSTDIR%\x-studio" -c --help
+
+## Use a new key & ivec to encrypt resources
+
+- Method A:
+  - Delete file encrypt-cfg.xml and run do-encrypt.bat
+  
+- Method B:
+  - run command: "%XS_INSTDIR%\x-studio" -c -enc -nk -cfg=.\encrypt-cfg.xml -i=.\assets-dev -o=.\assets
+  
+- After reencrypt with new key, you needs change it at AppDelegate.cpp
+
+## For more usage of x-studio encrypt system, run follow command:
+
+"%XS_INSTDIR%\x-studio" -c --help