Fix stylelint scss config

[skjnldsv]

• stylelint-scss is already included in https://github.com/stylelint-scss/stylelint-config-recommended-scss
• Comply to stylelint-recommended-vue guidelines for scss and fix linting
  https://github.com/ota-meshi/stylelint-config-recommended-vue#with-scss

Otherwise we get conflicts and it does this

% npm run stylelint                  

> photos@1.6.0 stylelint
> stylelint src


src/components/Navigation.vue
 147:1  ✖  Unexpected unknown at-rule "@use"         at-rule-no-unknown                
 148:1  ✖  Unexpected invalid position @import rule  no-invalid-position-at-import-rule
 177:2  ✖  Unexpected unknown at-rule "@include"     at-rule-no-unknown                
 181:3  ✖  Unexpected unknown at-rule "@if"          at-rule-no-unknown                

src/views/Albums.vue
 257:2  ✖  Unexpected unknown at-rule "@include"  at-rule-no-unknown

src/views/Tags.vue
 285:2  ✖  Unexpected unknown at-rule "@include"  at-rule-no-unknown

src/views/Timeline.vue
 302:2  ✖  Unexpected unknown at-rule "@include"  at-rule-no-unknown