Update stylelint + format code with Stylistic

[fbasmaison-lucca]

Description

• Update Stylelint and default config.
• Remove useless stylelint-config-prettier-scss package. Formatting rules have been removed from Stylelint in v16.
• Add Stylistic to format code.
• Fix or address violations.

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• Address scss/operator-no-unspaced rule.
• Address scss/at-if-closing-brace-newline-after rule.
• Address scss/operator-no-newline-after…
• Disable scss/operator-no-newline-before to allow having operators at the start of the line, which makes logical combination more legible with long lines.
• Address property-no-deprecated.
• Address no-invalid-position-declaration.
• Address nesting-selector-no-missing-scoping-root.
• Address block-no-redundant-nested-style-rules.
• Add some stylelint-disable for this Issue: stylelint-stylistic/stylelint-stylistic#30

Occurrences of // stylelint-disable @stylistic/indentation are waiting for this fix.

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