Enhance Get Source to Support File Output

[luprochazka-cen63872]

We frequently use Get Source to find locators instead of Appium Inspector. The Get Source keyword could have an argument to save the output to a specific file. If you approve this change, I can prepare a pull request for it.

${source_code}  Get Source
Create File  ${EXECDIR}${/}Results${/}source_code.xml  ${source_code}