Add ParaSpell XCM dAPP templates

Hello,

We see a few examples in the tool, but we are unable to find XCM examples thus we propose adding following templates:

https://github.com/paraspell/xcm-sdk-template
https://github.com/paraspell/xcm-router-template
https://github.com/paraspell/xcm-api-template

We have 3 different XCM Tools dapps examples.

Might be worth adding.

Thanks in advance!

With kind regards,
Team ParaSpell✨