feat: add capacity and number of sheltered pets

[evertonpavan]

Add the fields pets capacity and sheltered pets to the registration and updating of shelters

Add information about pets capacity and sheltered pets in the shelter information block.

Add the pets icon next to the shelter name on the homepage.

Task: https://sosriograndedosul.notion.site/Quando-o-abrigo-aceita-pets-habilitar-quantidade-de-vagas-e-capacidade-para-pets-414804de03f541d795e34baff7ee2371

related issue #173

Backend PR is here: https://github.com/SOS-RS/backend/pull/126

[larissapissurno]

oi @evertonpavan , poderia resolver os conflitos por favor?