Send project metadata to the index

[tmeasday]

Reverts #1121 (re-implements #1112) and incorporates #1120.

Also:

• added some error/timeout handling so we don't get stuck if there is something wrong with git.
• shorted timeouts to 5s as it's not critical this works (we could shorten further?)
• don't use wc or head as they may not be there. Instead:
  • simulate head -n 1 via streams
  • just count the number of lines for wc.
    • This is inefficient as it requires loading all the lines into memory.
    • I'm not sure if this will be a problem or not if a repo has a heap of contributors or "app files".
    • I could implement another execGitCommandCountLines but I figured it was better to keep the complexity down.

Things to check in QA:

• environments without access to head or wc.
• environments where these commands timeout [not sure how to simulate]

📦 Published PR as canary version: 11.20.0--canary.1122.12075262360.0

✨ Test out this PR locally via:

npm install chromatic@11.20.0--canary.1122.12075262360.0
# or 
yarn add chromatic@11.20.0--canary.1122.12075262360.0

[github-actions]

📦 Package Size: 5448 KB

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for 691ad521	✅ 91.71% (target: 80.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (691ad52)	Report Missing	Report Missing	Report Missing
Head commit (6daedce)	7295	5024	68.87%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1122)	217	199	91.71%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[jmhobbs]

just count the number of lines for wc.
This is inefficient as it requires loading all the lines into memory.

I think it's a good trade off to add a execGitCommandCountLines. I'd rather we read newlines out of the stream and discard with one additional function than keep unbounded values in memory, twice after the .split('\n')

[tmeasday]

@jmhobbs done! Looks like it still works (2 and 0 are the correct values for the repo I was testing with):

[jmhobbs]

Haven't QA'd, and there's some CI issues, but overall looks right to me.

[tmeasday]

@jmhobbs FYI the CI issues (outside of Codacy) is due to the production index not yet having projectMetadata.storybookBaseDir supported yet (need to merge the relevant PR on the other end). This is a good thing I guess (we can't merge this until that's done!)