Add top-level examples to all `Ronin::Payloads::Mixins` modules showing how they are meant to be used

[postmodern]

Every Ronin::Payloads::Mixins:: module should have a top-level example showing how they should be used in an payload class.

• [ ] Ronin::Payloads::Mixins::Binary
• [ ] Ronin::Payloads::Mixins::BindShell
• [ ] Ronin::Payloads::Mixins::BuildDir
• [ ] Ronin::Payloads::Mixins::ERB
• [ ] Ronin::Payloads::Mixins::Network
• [ ] Ronin::Payloads::Mixins::PostEx
• [ ] Ronin::Payloads::Mixins::ResolveHost
• [ ] Ronin::Payloads::Mixins::ReverseShell
• [ ] Ronin::Payloads::Mixins::Tempfile
• [ ] Ronin::Payloads::Mixins::TypeScript