feat: Resolve all deprecation warnings for sass

- Replace @import with @use and @forward
- Only color function is used in _basic.scss for now
- Change _all.scss to _index.scss
- Modules use direct dependencies
- Move @include from _config.scss to _common.scss, this was a long term mistake
- Remove $color_list
- Change basic_color()

_basic.scss

@@ -4,48 +4,38 @@
 // @import "../../vendor/normalizecss/normalize.css";
 // @import "../../node_modules/normalize.css/normalize.css";
 
-
-
-// Functions and Mixins
-// Important code constructions
-// -----------------------------------------------------------------------------
-@import "functions/all";
-@import "mixins/all";
-
-
-
 // Fonts
 // Use a central file outside of hippie for font definitions with @font-face
 // -----------------------------------------------------------------------------
 // @import "../../vendor/fonts.css";
 
-
+// Functions and Mixins
+// Important code constructions
+// -----------------------------------------------------------------------------
+@forward "functions/color";
+@forward "mixins";
 
 // Global configuration with default values
 // -----------------------------------------------------------------------------
-@import "global/config";
-
-
+@forward "global/config";
+@forward "global/common";
+@forward "global/typography";
 
 // Basic styles - this is the core of definitions
 // Individual styles can be added her
 // -----------------------------------------------------------------------------
-@import "global/common";
-@import "global/typography";
 // Following the w3c document element structure
 // https://w3c.github.io/html/index.html#contents
-@import "elements/sections";
-@import "elements/grouping";
-@import "elements/textlevel";
-@import "elements/embedded";
-@import "elements/tables";
-@import "elements/interactive";
-
-
+@forward "elements/sections";
+@forward "elements/grouping";
+@forward "elements/textlevel";
+@forward "elements/embedded";
+@forward "elements/tables";
+@forward "elements/interactive";
 
 // Individual Modules and variables
 // in dependency to other styles
 // -----------------------------------------------------------------------------
-@import "modules/breakpoint/breakpoint_module";
-@import "modules/tables/tables_module";
-@import "modules/maintenance/maintenance_module";
+@forward "modules/breakpoint/breakpoint_module";
+@forward "modules/tables/tables_module";
+@forward "modules/maintenance/maintenance_module";