verify the multi language atomicdex code block's syntax is correct in all the supported languages

[gcharang]

Add windows terminal support

[smk762]

Tested bash on linux, and got a userpass error.

This is because "userpass": "$userpass" should actually be "userpass": "'$userpass'"

Looking at the other examples, the userpass variable does not change as required for other languages. E.g. in python, "${userpass}" would not return a variable value, it would return the same text.

So for python and likely most other langs we'll need to:

• declare a userpass variable (as const / string where type is required)
• either source this from an environment variable (e.g. in py with userpass = os.getenv("USERPASS")) or as a generic YOUR_RPC_PASSWORD_HERE
• substitute $userpass within the source request body with the declared variable.

[smk762]

Ideally, this can be one via CI/CD. We just need to test the output for each lang variation in codeblocks using one of the playground nodes for some simple methods not using auth, but if using an mm2 image on the runner instead would allow for greater coverage.