feat: collapse downvoted comments by default when setting (default off) is set

[jameslounds]

Closes #1838

This is my first contribution, so it's very possible I've misunderstood something or not followed conventions in the project. As well as more substantive feedback, nitpicks are more than welcome - they help me learn!

About the `ppm-lcck.yaml` update (reverted)

Also not entirely sure why, but the pnpm-lock.yaml needed updating. pnpm i --frozen-lockfile gave an error

❯ pnpm i --frozen-lockfile
 ERR_PNPM_LOCKFILE_CONFIG_MISMATCH  Cannot proceed with the frozen installation. The current "patchedDependencies" configuration doesn't match the value found in the lockfile

Update your lockfile using "pnpm install --no-frozen-lockfile"

It seems that the CI won't pass with my updated lockfile (with the same error I get using the main lockfile).

The setting is off by default.

I've added hasUserCollapsed which is true if the value for commentId in state.comment.commentCollapsedById has been defined. If it hasn't we're in the initial state of the comment (uncollapsed unless downvoted & setting is set). If it has, the user must have shown/hidden the comment so we should use the state from state.comment.commentCollapsedById rather than the default.