This Premiere extension is a minimum in order to run a Panel in Premiere.
Download the code and put the folder in one of these places:
Since Premiere only accepts signed extension, you should tell it to accept unsigned extensions like this as well: https://github.com/Adobe-CEP/CEP-Resources/wiki/CEP-6-HTML-Extension-Cookbook-for-CC-2015#debugging-unsigned-extensions
Launch Premiere Pro and open this Panel under Window > Extensions > Testing
Please read the Adobe Panel "bible" here: https://github.com/Adobe-CEP/CEP-Resources/wiki
Also check out the Premiere Sample Panel from Adobe: https://github.com/Adobe-CEP/Samples/tree/master/PProPanel