[center.conan.io] Add a small set me up snippet, like in artifactory

Please add for every package a small how to setup code snippet, like it is done in artifactory. e.g.

conan remote add conan-center .. // maybe don't know whether this is necessary
conan install boost/1.72.2

Newbies wants to know how to get this binaries in no way.

[gocarlos]

also show the options available for the recipe e.g. Poco:enable_crypto=True

[SSE4]

this line is unnecessary for sure:

conan remote add conan-center .. // maybe don't know whether this is necessary

conan-center remote is automatically added by the conan client since the beginning