feat: moderation dashboard (#28962)

Co-authored-by: Debdut Chakraborty <debdut.chakraborty@rocket.chat>
Co-authored-by: Hugo Costa <hugocarreiracosta@gmail.com>
Co-authored-by: Diego Sampaio <chinello@gmail.com>
Co-authored-by: Guilherme Gazzo <guilhermegazzo@gmail.com>