(breaking changes)Add prefix to class name (#82)

* feat: add prefix

BREAKING CHANGE: add nes- to class prefix

* feat: fix storybook

scss/pixel-arts/ash.scss

@@ -1,4 +1,4 @@
-.ash {
+.nes-ash {
   $px: 6px;
   // prettier-ignore
   $ash-colors: (#f8f8ff, #ff614e, #007f7f,

scss/pixel-arts/bcrikko.scss

@@ -1,4 +1,4 @@
-.bcrikko {
+.nes-bcrikko {
   $px: 4px;
   $bcrikko-colors: (#333, #f9f2d7, #c5090c, #fff);
 

scss/pixel-arts/bulbasaur.scss

@@ -1,4 +1,4 @@
-.bulbasaur {
+.nes-bulbasaur {
   $px: 6px;
   // prettier-ignore
   $bulbasaur-colors: (#000, #8beb46, #2d8d22, #5ceee1,

scss/pixel-arts/charmander.scss

@@ -1,4 +1,4 @@
-.charmander {
+.nes-charmander {
   $px: 6px;
   // prettier-ignore
   $charmander-colors: (#000202, #f77702, #eb2010,

scss/pixel-arts/mario.scss

@@ -1,4 +1,4 @@
-.mario {
+.nes-mario {
   $px: 6px;
   // prettier-ignore
   $mario-colors: (#f81c2f, #65352b, #ffbb8e, #000,

scss/pixel-arts/octocat.scss

@@ -1,4 +1,4 @@
-.octocat {
+.nes-octocat {
   $px: 6px;
   $octocat-colors: (#333, #ffdec4, #cb7066);
   // prettier-ignore

scss/pixel-arts/phone.scss

@@ -1,4 +1,4 @@
-.phone {
+.nes-phone {
   $px: 6px;
   $phone-colors: (#596985, #3c4665, #000);
   // prettier-ignore

scss/pixel-arts/pokeball.scss

@@ -1,4 +1,4 @@
-.pokeball {
+.nes-pokeball {
   $px: 6px;
   $pokeball-colors: (#060606, #ff001d, #fff, #9fa1a1);
   // prettier-ignore

scss/pixel-arts/smartphone.scss

@@ -1,4 +1,4 @@
-.smartphone {
+.nes-smartphone {
   $px: 6px;
   $smartphone-colors: (#fff, #060606);
   // prettier-ignore

scss/pixel-arts/squirtle.scss

@@ -1,4 +1,4 @@
-.squirtle {
+.nes-squirtle {
   $px: 6px;
   // prettier-ignore
   $squirtle-colors: (#000, #9cf, #cb6633,