Added description for multiple choice polls

thanks, linter

I *think* this works; in my test instance (with no federated notes…)
the generated query looks correct, and PostgreSQL doesn't complain.

Closes  transfem-org/Sharkey#154

Closes transfem-org/Sharkey#195

Closes #199

Closes transfem-org/Sharkey#191

Closes transfem-org/Sharkey#196

Closes transfem-org/Sharkey#193

Co-authored-by: daph <d@waal.me>
Co-authored-by: Marie <marie@kaifa.ch>

Closes #192

Adds the ability to choose between `Sharkey` or `Misskey`

Co-authored-by: Gaspard Wierzbinski <contact@cpluspatch.com>
Co-authored-by: Marie <marie@kaifa.ch>

Closes transfem-org/Sharkey#181

closes transfem-org/Sharkey#182

I have _not_ tested this, but it should work fine, those exports are
the same shape as Mastodon's

the id / replyId are not at the top level, so now `recreateChain`
takes a list of keys to walk, not just a single key