Move the time-axis to its own library

[tahini]

The time-axis used is part of the timeline-chart library. It should be moved in a separate library so that it can be reused (eg for XY charts) and updated separately. The time-axis is the basis for navigation: zoom in/out, show the current time range.

• There is a unit controller "TimeGraphUnitController in the timeline-chart library that control the "time" and a "TimeAxisComponent" that use the unit controller to draw the axis
• Maybe everything can stay in the timeline-chart library or can be split into different components that can be added as dependencies
• The time-axis also has a visual representation. Be creative ;-) Lttng-scope had an interesting approach

[ebugden]

Fixed by theia-ide/timeline-chart

arfio: it is in the package.json of the theia-trace-extension and is built separately so I guess the issue can be closed

[bhufmann]

I re-opened this because this issue is about the time-axis of the timeline-chart library and not about the timeline-chart library itself. I also updated the description for clarification reason.