Add articles for ERC standards and Solidity bytecode limit.

[Zartaj0]

This PR adds two article series for solidity developers.

1. ERC articles - Mainly tackles the whole idea of ERCs and specifically focuses on the Token standards. It completely guides developers throughout the journey of a token, including NFTs and and Multi-Token ERC1155.

2. Bytecode limit articles - This is a problem, where developers will eventually reach. These articles curate the ways to downsize the bytecode size of smart contracts.

Checklist

• [x] The URL is not already present in the list (check with CTRL/CMD+F in the raw markdown file).
• [x] Each description starts with an uppercase character and ends with a period.
  Example: solc-js - JavaScript bindings for the compiler.
• [x] Drop all A / An prefixes at the start of the description.
• [x] Avoid using the word Solidity in the description.