Kogito-Tooling code formatting

FAI-362 pull request (PR) demonstrates consequence of kogito-tooling non unified formatting. Then appears pull requests containing more formatting changes than logical changes.

We should investigate option of unify formatting and then require formatting been applied as part of full downstream build.

We already have this requirement for [kogito-apps/ui-packages/https://github.com/kiegroup/kogito-apps/blob/master/ui-packages/]. It is defined in '.prettierrc' file. Most of options are set to default values. However those not set to default are:

• "singleQuote": true
• "trailingComma": "none"

Both options above should be considered also for kogito-tooling. Complete list of options can be seen here. After my investigation of changes done by prettier: these options should be discussed:

• "singleQuote"
• "trailingComa"
• "arrowParens"
• "tabWidth"

Acceptance criteria

• check of formatting is automatically done with every PR
• README informs of needed setup for developers, actions needed before opening PR
• changes announced via an e-mail