feat: extend uplift to support config validation

[ga-paul-t]

closes #105

[codecov-commenter]

Codecov Report

Merging #324 (f0f640f) into main (b74f73c) will decrease coverage by 1.04%.
The diff coverage is 76.69%.

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@@            Coverage Diff             @@
##             main     #324      +/-   ##
==========================================
- Coverage   82.60%   81.56%   -1.04%     
==========================================
  Files          43       43              
  Lines        2242     2284      +42     
==========================================
+ Hits         1852     1863      +11     
- Misses        310      333      +23     
- Partials       80       88       +8     

Impacted Files	Coverage Δ
internal/task/gittag/gittag.go	85.00% <0.00%> (-4.48%)	⬇️
internal/task/gitcommit/commit.go	72.97% <25.00%> (-6.44%)	⬇️
cmd/uplift/release.go	79.20% <38.46%> (-5.96%)	⬇️
cmd/uplift/changelog.go	79.27% <46.15%> (-7.05%)	⬇️
cmd/uplift/bump.go	78.37% <50.00%> (-4.96%)	⬇️
cmd/uplift/tag.go	79.74% <60.00%> (-4.60%)	⬇️
cmd/uplift/check.go	72.72% <72.72%> (ø)
internal/config/uplift.go	87.09% <92.85%> (+4.74%)	⬆️
cmd/uplift/root.go	81.39% <100.00%> (+0.44%)	⬆️
internal/task/hook/after/hook.go	100.00% <100.00%> (ø)
... and 16 more

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