Sass lint rules

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Koha now has a default Sass lint configuration file, .sass-lint.yml, which can be used when working with staff client SCSS. The file contains a set of rules which can be used by various tools to lint SCSS with sass-lint. Some default rules have been defined, including the following notable rules:

• attribute-quotes - Attribute values should be quoted

• empty-line-between-blocks - There should be a blank line between nested blocks
• force-attribute-nesting - Require that attributes be nested
• force-element-nesting - Require that elements be nested
• force-pseudo-nesting - Require that pseudo elements/classes be nested
• leading-zero - Disallow a leading zero on decimal numbers
• no-color-keywords - Require that colors be delcared using hexadecimal
• no-duplicate-properties - No duplicate properties within the same block
• no-important - Forbid the use of !important
• no-mergeable-selectors - Forbid duplicate selectors
• no-url-domains - Forbid urls containing domain names
• no-vendor-prefixes - Forbid the use of vendor prefixes
• one-declaration-per-line - Each declaration should appear on its own line
• single-line-per-selector Each selector should appear on its own line
• space-after-colon - There should be a single space after a colon
• space-after-comma - There should be a single space after a comma
• space-before-brace - There should be a space before an opening curly brace
• space-before-colon - There must not be a space before a colon
• trailing-semicolon - All declarations should end in a semicolon
• url-quotes - URLs should be quoted
• zero-unit - Values of 0 for length should be unitless