updated output to include commercial timeperiod and a "< X" line as well

[joeeames]

added a bar for commercial time period per conversation on nodejs-tsc-herodevs slack and approval of this graphic:

[BethGriggs]

per conversation on nodejs-tsc-herodevs slack and approval of this graphic:

I don't know who are the group that approved this, but I feel this addition makes the graphic timeline much less legible and difficult to follow. Perhaps the timeline for commercial support should be a separate graphic with accompanying text explanation.

[aduh95]

There are conflicts to fix, as well as some comments to address here