Add usage instructions for all of the builtin generators to the Use It page

[samuel-emrys]

it would be good to have usage instructions for all of the supported *Deps generators for every recipe, i.e.

• CMakeDeps/CMake
• AutotoolsDeps/Autotools
• MakeDeps/Makefile
• PkgConfigDeps/pkgconfig
• XCodeDeps/XCode
• MesonToolchain/Meson (no Deps for this?)
• MSBuildDeps/MSBuild
• NMakeDeps/NMake
• SConsDeps/SCons

Each of these could be a different tab on the same section providing equivalent information to what's currently shown for CMake. Given that one of the enormous benefits of conan is the ability to abstract over the build system, demonstrating usage in each and making it easy for users to use the best build system for them would be very useful.

Continuation of the second part of #120