meta: add support for alpha prerelease tag

[aduh95]

Refs: nodejs/Release#1154

There would be more work needed on the tooling (i.e. NCU), but let's see first if we have consensus on the process.

[nodejs-github-bot]

Review requested:

• @nodejs/tsc

[Renegade334]

So, under this schema, alpha versions would be named A.B.C-alpha.D.E.F? Would it not make more sense to have a single alpha counter?

[aduh95]

Would it not make more sense to have a single alpha counter?

Why? What would be the upside?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.70%. Comparing base (18f938d) to head (fa0ef1a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #63135      +/-   ##
==========================================
+ Coverage   89.67%   89.70%   +0.02%     
==========================================
  Files         712      712              
  Lines      221251   221251              
  Branches    42393    42390       -3     
==========================================
+ Hits       198413   198464      +51     
+ Misses      14681    14622      -59     
- Partials     8157     8165       +8     

see 50 files with indirect coverage changes

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