feat(Search): add hover color variables

src/search/scss/variable.scss

@@ -24,6 +24,9 @@ $search-simple-corner: $corner-1 !default;
 /// color
 /// @namespace statement/normal
 $search-normal-primary-color: $color-brand1-6 !default;
+/// hover
+/// @namespace statement/normal
+$search-normal-primary-hover-color: $color-brand1-6 !default;
 /// split
 /// @namespace statement/normal
 $search-normal-primary-split-color: $color-line1-1 !default;
@@ -174,6 +177,9 @@ $search-normal-normal-m-btn-text-size: $font-size-subhead !default;
 /// color
 /// @namespace statement/normal
 $search-normal-dark-color: $color-brand1-6 !default;
+/// hover
+/// @namespace statement/normal
+$search-normal-dark-hover-color: $color-brand1-6 !default;
 /// text
 /// @namespace statement/normal
 $search-normal-dark-text-color: $color-white !default;
@@ -266,6 +272,9 @@ $search-simple-normal-btn-text-padding-left: $s-zero !default;
 /// color
 /// @namespace statement/normal
 $search-simple-dark-color: $color-line1-3 !default;
+/// hover
+/// @namespace statement/normal
+$search-simple-dark-hover-color: $color-line1-3 !default;
 /// background
 /// @namespace statement/normal
 $search-simple-dark-bg-color: $color-white !default;