This PR is a continuation of
https://github.com/paritytech/polkadot-sdk/pull/2102 and part of an
initiative started here https://hackmd.io/@romanp/rJ318ZCEp
What has been done:
- The content under `docs/*` (with the exception of `docs/mermaid`) has
been moved to `docs/contributor/`
- Developer Hub has been renamed to Polkadot SDK Docs, and the crate has
been renamed from `developer-hub` to `polkadot-sdk-docs`
- The content under `developer-hub/*` has been moved to `docs/sdk`

---
Original PR https://github.com/paritytech/polkadot-sdk/pull/2565, it has
been close due to too many rebase conflicts

---------

Co-authored-by: Serban Iorga <serban@parity.io>
Co-authored-by: Chevdor <chevdor@users.noreply.github.com>
Co-authored-by: Egor_P <egor@parity.io>
Co-authored-by: Bastian Köcher <git@kchr.de>

Closes:
- #1383 
- Declared chains can be now be imported and reused in a different
crate.
- Chain declaration are now generic over a generic type `N` (the
Network)
- #1389
- Solved #1383, chains and networks declarations can be restructure to
avoid having to compile all chains when running integrations tests where
are not needed.
- Chains are now declared on its own crate (removed from
`integration-tests-common`)
- Networks are now declared on its own crate (removed from
`integration-tests-common`)
    - Integration tests will import only the relevant Network crate
- `integration-tests-common` is renamed to
`emulated-integration-tests-common`

All this is necessary to be able to implement what is described here:
https://github.com/paritytech/roadmap/issues/56#issuecomment-1777010553

---------

Co-authored-by: command-bot <>

Adding link checker to the CI (closes
https://github.com/paritytech/polkadot-sdk/issues/993). It would be nice
to have the docs people own this and extend accordingly.
Currently all known-bad links are excluded, but we should one-by-one
include those as well until all are fixed.

This check now ensures that 1) no new broken links are introduced into
`.rs` files and 2) that no old links break unnoticed.

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Delete stale adoc files

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Convert adoc to md

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Add adoc to gitignore

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Delete more random unmaintained files

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Markdown lint

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Remove .cargo folders

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Remove rustfmt.toml

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Hide rustfmt.toml file

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Merge .gitignore files

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Update commit hash after history-rewrite

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Try to hot-fix license scanner

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Update .gitignore

Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

* Undo changes to check-license

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

* Add CI for monorepo

* fix frame tests

* Format features

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* add note for skipping tests and disable test-linux-stable-all

* Fix tests and compile issues (#1152)

* Fix feature dependant import

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Bump test timeout

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Remove feature gate

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Add resolver 2

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Remove old lockfile

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Format features

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Fix check-dependency-rules

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* rm test-runtime

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Actually fix script

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* enable cargo-check-each-crate-macos

* Run check-each-crate on 6 machines (#1163)

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

Signed-off-by: alvicsam <alvicsam@gmail.com>