[BREAK] Marketplace standalone page and app request flow (#27389)

Co-authored-by: dougfabris <devfabris@gmail.com>
Co-authored-by: Júlia Jaeger Foresti <60678893+juliajforesti@users.noreply.github.com>
Co-authored-by: Tiago Evangelista Pinto <tiago.evangelista@rocket.chat>
Co-authored-by: Felipe <84182706+felipe-rod123@users.noreply.github.com>
Co-authored-by: yash-rajpal <rajpal.yash03@gmail.com>
Co-authored-by: Matheus Carmo <matheus.carmo@rocket.chat>
Co-authored-by: Guilherme Gazzo <guilhermegazzo@gmail.com>
Co-authored-by: Rafael Tapia <rafael.tapia@rocket.chat>
Co-authored-by: Rodrigo Nascimento <rodrigoknascimento@gmail.com>
Co-authored-by: Diego Sampaio <chinello@gmail.com>