Documentation for Monitoring Employees

[ArchaeotheriumSapienter]

Created intended-use-of-activitywatch.rst to tackle issue 528:

Document how ActivityWatch is not designed to monitor employees.

Content of intended-use-of-activitywatch.rst:

• Intended Use of ActivityWatch - has the vision of ActivityWatch
• Monitoring of Unaware Individuals Using ActivityWatch
• Employee Monitoring Using ActivityWatch
• Report Feature - Proposed plan in issue 233