Create recipe for prettier and consolidate active repos

[Siegrift]

The config that we use probably looks similar to this:

{
  "bracketSpacing": true,
  "printWidth": 120,
  "singleQuote": true,
  "tabWidth": 2,
  "trailingComma": "es5",
  "useTabs": false,
  "plugins": ["prettier-plugin-solidity", "prettier-plugin-organize-imports"],
  "overrides": [
    {
      "files": "*.md",
      "options": {
        "parser": "markdown",
        "proseWrap": "always"
      }
    },
    {
      "files": "*.sol",
      "options": {
        "parser": "slang",
        "printWidth": 120,
        "tabWidth": 2,
        "useTabs": false,
        "singleQuote": false,
        "bracketSpacing": false
      }
    }
  ]
}

with small expcetions:

1. The older contract repos preferred line length of 80 and not 120
2. Markdown wrapping leads to worse reviews and I've changed my opinion on it. Initially I liked the text alignment, but similar thing can be achived with toggling word wrap.

It's OK for projects to use whatever they want, but we can have a recommended recipe with good default and document what are the reasonable changes the projects can choose.