Add comments to CodeMirror Plugin for improved clarity

[devleejb]

What would you like to be added:

Currently, in CodePair, we are using the remoteSelection and yorkieSync plugins for the integration of Yorkie. However, the complex logic within these plugins makes them difficult to understand. To enhance clarity and usability, I propose adding comments throughout the code of these plugins.

Why is this needed:

Adding comments will help developers understand the functionality and flow of the code better, making it easier to maintain and modify in the future. This will also facilitate onboarding for new developers working with the CodeMirror plugin.

Additional Information:

[devleejb]

We can refer these documentations.

• https://codemirror.net/docs/ref/#view.PluginValue
• https://codemirror.net/docs/ref/#view.ViewPlugin

When I write this code, I used the structure of y-codemirror.next.

• https://www.npmjs.com/package/y-codemirror.next