Add ERC-223 token standard

[gorbatiukcom]

Description

This is an improved version of #11787 created by @Dexaran

List of changes:

• Add ERC-223 page
• Add mentions of the ERC-223 standard to the /developers/docs/standards and /developers/docs/standards/tokens pages
• Add mention of ERC-223 standard in developer documentation nav links

Related PR's

#10841
#11787

Related Issue

#10854

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[gorbatiukcom]

Does anyone have an opportunity to review this PR?
@corwintines @Pandapip1

[gorbatiukcom]

@corwintines @Pandapip1
Can you please review the PR?
I have resolved conflicts that have arisen during the wait.
If there is anything I can do to help speed up the PR's acceptance, please let me know.

[lalitsharmaprofile-work]

Hey @corwintines @wackerow @minimalsm @nhsz @pettinarip can you please look into the PR request, the conflicts are resolved and the features that are being provided looks very promising for ERC-223 !!