Migrate NFT Support, Protocol, an d Governance docs from docs.0x.org into Protocol docs

[jlin27]

Description

Migrating 3 sections from https://docs.0x.org/ into the Protocol docs as they are more relevant to 0x Protocol than 0x Labs.

Testing instructions

See build instructions here: https://github.com/0xProject/protocol/tree/development/docs

Types of changes

• Update Exchange Proxy section
• Add additional details for NativeOrders, ERC721Orders, and ERC1155Orders Features
• Add Signatures schemes
• Add files for NFT Support section:
  • Creating Orders, Royalties and Fees, Collection Offers
  • Signing Orders, On-chain Orders
  • Filling Orders
  • Cancelling Orders
  • Fetching NFT Order Data
• Update Governance section with the following:
  • Governance Participants
  • Types of Votes
  • Community Treasury
  • Apply for a 0xDAO Grant (v2)
  • How to Delegate ZRX
  • How to Vote

[duncancmt]

docs/get-pip.py should not be included in this repo. it's available from pypa.io

[duncancmt]

this doesn't appear to concern NFT royalties, but instead how to hash the limit order struct

[jlin27]

Good catch, updated this page

[jlin27]

docs/get-pip.py should not be included in this repo. it's available from pypa.io

Removed docs/get-pip.py

[jlin27]

These CI tests don't appear to be docs related. Is this okay to merge @duncancmt ?

[wonge97]

we merged the NFT, protocol, and governance docs in PR #675 - proposing that we can close this PR

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.