choice: add page (#4677)

pages/windows/choice.md

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+# choice
+
+> Prompts the user to select one item from a list of single-character choices in a batch program, and then returns the index of the selected choice.
+> If used without parameters, choice displays the default choices Y and N.
+> More Information: <https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/choice>.
+
+- A,B and C as list of choices to be used:
+
+`choice /c {{ABC}}`
+
+- Use the default [Y,N] list of choices:
+
+`choice`
+
+- Specify that the choices are case-sensitive:
+
+`choice /CS {{AaBb}}`
+
+- Specify the number of seconds to pause before using the default choice specified by `/d`:
+
+`choice /C {{AaBb}} /t {{3}} /d {{b}}`
+
+- Specify a message to display before the list of choices. If `/m` is not specified, only the choice prompt is displayed:
+
+`choice /m {{message}} /C {{ABC}}`
+
+- Display help message:
+
+`choice /?`