demo-6: fixed slow call

Fixed bug that calling the exported function from lang go for the non-first time is very slow and takes around 5 seconds.

demo-5

Weixin 4.0 is now supported.

demo-4

Fixed an issue when recognized text having speicial chars hurting json.
published non-py wcocr.dll, with this dll, you don't need install python any more as long as you don't use the python extension.
(huh, a guy who refuse to install python will never use the python extension)

demo-3

add a c# exe to prove C# is able to use the dll.
change test.png with some chinese characters to prove unicode path is supported.

demo-2

run with py 3.10 or 3.12

demo-1

the first built demo.