Add tagui_location() to support setting custom TagUI installation directory [done]

[kensoh]

By default, the package installs TagUI to %APPDATA%/tagui folder for Windows, and ~/.tagui folder for Mac and Linux.

PR #207 by @fi-do will add option for users to specify where to install and where to find the installation to init() the tool.

To review to see if that can be implemented as a separate function or to provide as parameter to existing functions.

[kensoh]

This is added in v1.36, available with pip install rpa --upgrade

• to use, set r.tagui_location('your_full_path') before calling r.init() or r.pack()
• use r.tagui_location() to return the current parent folder where TagUI is installed in

[kensoh]

For example, following works on macOS and installs TagUI to a .tagui folder within Desktop folder.

import rpa as r
r.tagui_location('/Users/username/Desktop')
r.init()
r.url('https://google.com')
r.close()

[kensoh]

See PR #207 for more info on the discussions. Thanks to @fi-do !