chore: synchronise linting rules of repositories

[benceharomi]

What ❔

Simplified/standardised the way of calling the linting/formatting commands for checking/fixing the rules in the repositories:

• yarn prettier:check -> check formatting
• yarn prettier:fix -> formats the files with incorrect format
• yarn lint:check -> checks the rules and formatting
• yarn lint:fix -> fixes the rules and formatting (modifies the files and fixes the automatically fixable errors)

Also added these options to the calculate-hashes command:

• yarn calculate-hashes:check -> calculates the hashes and compares them to the SystemContractsHashes.json
• yarn calculate-hashes:fix -> calculates the hashes and updates the SystemContractsHashes.json

Added pre-commit and pre-push hooks to check formatting/linting automatically with PR #56

Why ❔

Currently the era-contracts and the era-system-contracts repositories have different linting and formatting rules, the goal of this task is to synchronise them.

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.