doc: add a document about program dictionary

website/docs/howto/how to add a program as dictionary.md

@@ -0,0 +1,51 @@
+# How to add a program or script to the goldendict-ng
+
+GoldenDict has offered a program dictionary function that allow you to customize the user experience when using the this software.
+
+# An example
+
+tokenize the input german sentence into words.
+
+## use python script 
+
+You can use any script language or program to implement this feature.
+
+
+## install python
+
+## install SoMaJo
+
+you can follow the instructions in the documentation https://github.com/tsproisl/SoMaJo?tab=readme-ov-file#installation
+
+`pip install -U SoMaJo`
+
+## create a script 
+
+```
+from somajo import SoMaJo
+import sys
+
+tokenizer = SoMaJo("de_CMC", split_camel_case=True)
+
+# note that paragraphs are allowed to contain newlines
+paragraphs = [sys.argv[1]]
+sentences = tokenizer.tokenize_text(paragraphs)
+for sentence in sentences:
+    for token in sentence:
+        if token.token_class=='regular':
+            print(f"{token.text}")
+```
+
+and save the script in the E:\test.py for example.
+
+## add the script to the program dictionary 
+
+![Add the script as program dictionary](add-program-dictionary.png)
+`python e:\test.py %GDWORD%`
+
+## the result
+
+![](program-result.png)
+
+
+

website/mkdocs.yml

@@ -57,4 +57,5 @@ nav:
        - Build ffmpeg on Windows: howto/how to build ffmpeg for visual studio.md 
        - How to update the crowdin.ts file: howto/how to update crowdin.ts file.md
        - How to debug dictionary js: howto/how to debug dictionary js.md
+       - How to add a program dictionary: howto/how to add a program as dictionary.md