feat: ROSS chart in repo pages

[zeucapua]

Description

Implements ROSS (Rate of Self Selection) Dev Stat for repo pages, showing the spread between new, recurring, and internal contributors. This new chart replaces the ContributorChart while taking the total and average per day values calculated from the contributor histogram data.

Related Tickets & Documents

Closes #3548

Mobile & Desktop Screenshots/Recordings

Steps to QA

Tier (staff will fill in)

• [ ] Tier 1
• [x] Tier 2
• [ ] Tier 3
• [ ] Tier 4

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[brandonroberts]

Looks great! The weeks are in reverse order

[zeucapua]

More of an aesthetic, but the graph x axis seems real short (looks like it was before so maybe a moot point). but the bars are super chonky compared to the other graphs and what it was before.

Before ROSS index

With ROSS index

I think this is due to the difference in delta between the two charts. Before it could go from 1 to 20. Now the delta is smaller so the chart is probably rendering it like that.

[bdougie]

Is it possible to not show items, like "internal" when they are 0

[zeucapua]

Is it possible to not show items, like "internal" when they are 0

Now fixed!