add pallet macro kitchensink example/template (#14052)

* add pallet macro kitchen-sink pallet

* update

* Adds benchmarking setup

* Updates APIs

* Fixes benchmark

* Uses derive_impl for frame_system

* Adds benchmarks

* Minor update

* Adds license

* Adds examples crate

* ".git/.scripts/commands/fmt/fmt.sh"

* Update frame/examples/kitchensink/src/tests.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Update frame/examples/kitchensink/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Update frame/examples/kitchensink/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Addresses review comments

* Addresses review comments

* ".git/.scripts/commands/fmt/fmt.sh"

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Co-authored-by: Nikhil Gupta <17176722+gupnik@users.noreply.github.com>
Co-authored-by: command-bot <>
Co-authored-by: command-bot <ci@gitlab.parity.io>