Ability for users to add their own assets and an option to use it exclusively

[zaerald]

Add an ability to customize the out-of-the-box alert messages and sound of each alert. We should include a way for users to have a spec file and add it to the folder they provided and parse it so users could assign which asset motivation they wanted to trigger. We already have a file similar to this, we just needed a way to standardize it on the project.

We need a way for users to link or refer a folder with wmp.json file that contains

[{
  "title": "Title of the alert",
  "message": "Message of the alert",
  "sound": "ganbatte_onii_chan.wav",
  "categories": [
   "positive",  "negative", "neutral"
  ]
}]

categories - array

• "positive" - for cheering events, like passing a test, and also used in requesting a motivation
• "negative" - for sad events, like failing a test
• "neutral" - used for both positive and negative events (default when no categories property is provided).

Folder structure might just contain the wmp.json file with the sound assets.

/ 
  - wmp.json
  - somesound.wav