Add option to throw an error/replace existing file in Move File action when file exists in target path

[stas-fomenko]

Description:
Action should have 2 behaviors to choose in a case when a file already exists in a target directory:

• replace existing file
• throw an error that file already exists

In this PR #77 that is going to be merged implemented replace existing file behavior that is needed for a project and it replaced throw an error that file already exists behavior, but it is good to have both of them in Move File action