feat: add understanding of more commit types

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🚀 Feature: Add more ignored commits #103
• That issue was marked as accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

In addition to adding in commit types like build: and ci:, I also enhanced the granularity of commit type checking in a new getCommitMeaning function. This way commits like feat: bump some dependency to 1.2.3 still count as meaningful. Previously they would have first been hit by isReleaseCommit.

[codecov]

Codecov Report

Merging #112 (1d1acc2) into main (d746446) will increase coverage by 27.60%.
The diff coverage is 63.15%.

@@            Coverage Diff             @@
##            main     #112       +/-   ##
==========================================
+ Coverage   7.69%   35.29%   +27.60%     
==========================================
  Files          4        4               
  Lines         26       34        +8     
  Branches       4        8        +4     
==========================================
+ Hits           2       12       +10     
+ Misses        24       22        -2     

Files	Coverage Δ
src/getCommitMeaning.ts	100.00% <100.00%> (ø)
src/shouldSemanticRelease.ts	0.00% <0.00%> (ø)

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