Add cyberpunk night theme by @alemvigh (#1730)

novelwriter/assets/syntax/cyberpunk_night.conf

@@ -0,0 +1,26 @@
+[Main]
+name       = Cyberpunk Night
+author     = Anders Lemvigh
+url        = https://github.com/alemvigh
+license    = CC BY-SA 4.0
+licenseurl = https://creativecommons.org/licenses/by-sa/4.0/
+
+[Syntax]
+background     =   0,   0,   0
+text           = 150, 150, 150
+link           =  77, 077, 255
+headertext     = 255, 255, 255
+headertag      =  50,   0, 180
+emphasis       =   0, 255, 255
+straightquotes =   7,  27, 219
+doublequotes   =   0, 255,   0
+singlequotes   =   0, 140, 255
+hidden         =  77,  77, 100
+shortcode      = 255, 255,   0
+keyword        = 255, 100, 255
+value          = 255, 150,  10
+spellcheckline = 242,  72,  23
+errorline      = 186, 218,   4
+replacetag     =   0,   0, 180
+modifier       = 144, 142, 176
+optional       = 180, 180, 180

novelwriter/assets/themes/cyberpunk_night.conf

@@ -0,0 +1,29 @@
+[Main]
+name        = Cyberpunk Night
+description = A taste of the future 80s
+author      = Anders Lemvigh
+url         = https://github.com/alemvigh
+license     = CC BY-SA 4.0
+licenseurl  = https://creativecommons.org/licenses/by-sa/4.0/
+icontheme   = typicons_dark
+
+[Palette]
+window          =   0,   0,   0
+windowtext      = 150, 150, 150
+base            =   0,   0,   0
+alternatebase   =  30,  20,  45
+text            = 150, 150, 150
+tooltipbase     =  40,  20,  70
+tooltiptext     = 255, 255, 255
+button          =  5,   0,   10
+buttontext      = 150, 150, 150
+brighttext      = 255, 255, 255
+highlight       =  50,  30,  80
+highlightedtext = 255, 255, 255
+link            =  77,  77, 255
+linkvisited     =  50,   0,  80
+
+[GUI]
+statusnone      =  50,  50,  50
+statussaved     =  77, 255,  77
+statusunsaved   = 255,  77,  77