feat: timing estimator (#212)

Description

• move the estimator package to the DBLab repository in order to have an ability to use it in CI observer as well
• provide web-socket API to start estimation remotely (for example, from the Joe Bot repository)

Related issue

#212 (closed)

Examples

#212 (comment 520279684)

Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes, specifications reflect those changes and they have been reviewed OR there are no API changes