Logging for Site operations

[nicholaschuayunzhi]

Found this as a todo in Site.js in markbind-cli

https://github.com/MarkBind/markbind-cli/blob/25b595df8e91ac97f626004f1d9b770dca4adf2a/lib/Site.js#L80-L86

Just collating all the required operations to be logged for user feedback. A loading bar of sorts would be helpful as well.

Logging Information

Build

• build start
• build info
  1. collect baseUrl
  2. build assets
  3. build source files
     • generate pages
  4. copy markbind asset
• build end + timing (speed)

Live Reload

• live reload start
• reload info
  • number of pages rebuilt
• live reload end + timing + ready to inspect changes

[acjh]

• Verbosity should be one of the options.
• Related: [Request for feature] Provide timestamp in logging #117 (Provide timestamp in logging)

[acjh]

#183 (comment):

At some point we should adopt a proper logging framework so that we can increase logging verbosity when we want to capture more info.

[ang-zeyu]

Closing this issue as the lower level details are unapplicable at this point, moved to #1715