Add palenight

src/palenight.less

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+@import "palette/palenight";
+@import "template/index";

src/palette/palenight.less

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+@primary:     #89DDFF; // primary color used in main texts
+@secondary:   #C792EA; // secondary color used in some texts and text based buttons
+@tertiary:    #82AAFF; // tertiary color used in other colored texts
+@fg:          #BFC7D5;
+@bg0:         #292D3E;
+@bg1:         mix(@bg0, @bg4, 75%);
+@bg2:         mix(@bg0, @bg4, 50%);
+@bg3:         mix(@bg0, @bg4, 25%);
+@bg4:         #353a50;
+@red:         #FF5572;
+@orange:      #FFCB6B;
+@yellow:      #F78C6C;
+@green:       #C3E88D;
+@cyan:        #89DDFF;
+@blue:        #82AAFF;
+@purple:      #C792EA;
+@grey:        #697098;
+@red-bg:      #55393d;
+@green-bg:    #394634;
+@blue-bg:     #354157;
+@yellow-bg:   #4e432f;
+@button1:     #82AAFF;
+@button2:     #C3E88D;
+@button-red:  #FF5572;
+@key:         @purple;
+@operator:    @blue;
+@string:      @green;
+@value:       @red;
+@type:        @yellow;
+@function:    @cyan;
+@special:     @orange;