Add ERC: Permissionless CREATE2 Factory (ethereum#1052)

* Create erc.md

* Rename erc.md to erc-permissionless_create2_factory.md

* Add discussion link

* Fix Minor Typo

Just fixes a small inconsistency where we were using `||` and `++` for byte concatenation. Prefer the former.

* Fix Heading for 3rd Existing Method

* Add More Context about Using Private Key (#2)

* Minor Edits

- Remove duplicate linking to EIP-7702 (only first one should be
linked)
- Remove trailing whitespace
- Fix spelling error

* Fix Requires Reference

Requires should be _just_ numbers without the `EIP-` or `ERC-` prefix.
This causes issues with the generated HTLM and proofer.

* Title Case Sections

Fixed some section titles that weren't titlecased correctly.

* Use `RETURNDATASIZE` Instead of `PUSH0`

In order to not depend on EIP-3855 `PUSH0` opcode, we refactor the
factory code to use `RETURNDATASIZE` which is guaranteed to be
`0` **except** for when `CREATE2` reverts.

With a little bit of moving code around, we also managed to change
make the code one byte smaller and fit into a 32-byte word.

* Typos

* Use eip number

* Fix Section Lint

The ERC lint does not like additional top level sections, so move the
"custom" forwards compatibility section into a subsection of the
backwards compatibility

* Remove Non-relative Links

We remove all non-relative links, as the ERC linter does not allow
them. This is slightly unfortunate, since they did provide additional
context to the ERC, but 🤷.

Note that we format GitHub repositories with italicized title and code
for them to stand out:

```
_Title_ (`org/repo`)
```

* Edits to ERC (ethereum#4)

* Edits to ERC

This PR implements the suggested edits to the ERC, and adds a new
section explaining the rationale why Nick's method cannot be used for
generating the EIP-7702 authorization signature (since it was a
question on Ethereum magicians).

* Some small follow-up edits

* Another small edit

* Clarify reverts cause.

Co-authored-by: Shebin John <admin@remedcu.com>

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Co-authored-by: Shebin John <admin@remedcu.com>

* Fix Description

The description included a forbidden word, remove it.

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Co-authored-by: Nicholas Rodrigues Lordello <n@lordello.net>
Co-authored-by: Nicholas Rodrigues Lordello <nick@safe.global>
Co-authored-by: Shebin John <admin@remedcu.com>

Author: 3 people