Fix various documentation, user-facing, and source comment typos

[luzpaz]

Found using codespell -q 3 -S ./options/locale,./vendor -L ba,pullrequest,pullrequests,readby

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@9543e06). Click here to learn what that means.
The diff coverage is 8.33%.

@@           Coverage Diff           @@
##             main   #16367   +/-   ##
=======================================
  Coverage        ?   45.51%           
=======================================
  Files           ?      709           
  Lines           ?    83755           
  Branches        ?        0           
=======================================
  Hits            ?    38124           
  Misses          ?    39497           
  Partials        ?     6134           

Impacted Files	Coverage Δ
cmd/dump.go	0.91% <0.00%> (ø)
cmd/hook.go	0.00% <ø> (ø)
cmd/migrate_storage.go	0.00% <0.00%> (ø)
cmd/web_letsencrypt.go	0.00% <ø> (ø)
models/branches.go	44.71% <0.00%> (ø)
models/context.go	52.00% <ø> (ø)
models/error.go	39.68% <0.00%> (ø)
models/issue_comment.go	52.72% <ø> (ø)
models/issue_dependency.go	62.68% <ø> (ø)
models/login_source.go	28.64% <ø> (ø)
... and 44 more

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[luzpaz]

Shall i squash the commits down? BTW, 'm submitting upstream fixes to the iframe-resizer lib as well soon.

[6543]

we do squash merge every pull @luzpaz so it's better to not squash so reviewers know what has changed.

thanks for asking and good to hear to see it upstream fixed too ;)