Edit guide and add [template] snippet

[sukanyaw]

• Add double backslash in guide windows write of "path_to_python", like guide of "robot_framework_workspace".

• Add snippets [Template] that use case specifies the template keyword to use. The test itself will contain only data to use as arguments to that keyword. (reference UserGuide-Template)

[aaltat]

Thank you from the contribution.

Looks good, from review point of view. Templates are not automatically tested, so I need to try it out, before I merge PR to master.

[sukanyaw]

thank you.