Fix kanagawa theme lint and added git gutter colors (helix-editor#5273)

* Fix kanagawa theme lint

Comprises 4 changes:
1. added "sumiInk3" as ui.cursorline.primary bg color
2. switched the cursor bg and fg colors (now in line with original theme)
3. added ui.menu and ui.selected colors
4. separated ui.selection and ui.selection.primary

* Add git gutter colors to kanagawa theme

In line with original:
autumnGreen for adds
autumnRed for deletes
autumnYellow for changes

* Add indent-guides and linenr.selected to kanagawa

* indent-guides are sumiInk4
* Add ui.linenr.selected is roninYellow

* Set ui.help bg to sumiInk1

runtime/themes/kanagawa.toml

@@ -7,10 +7,14 @@
 # because of some theming differences, it's not an exact copy of the original.
 
 ## User interface
-"ui.selection" = { bg = "waveBlue1" }
+"ui.selection" = { bg = "waveBlue2" }
+"ui.selection.primary" = { bg = "waveBlue1" }
 "ui.background" = { fg = "fujiWhite", bg = "sumiInk1" }
 
 "ui.linenr" = { fg = "sumiInk4" }
+"ui.linenr.selected" = { fg = "roninYellow" }
+
+"ui.virtual.indent-guide" = "sumiInk4"
 
 "ui.statusline" = { fg = "oldWhite", bg = "sumiInk0" }
 "ui.statusline.inactive" = { fg = "fujiGray", bg = "sumiInk0" }
@@ -23,15 +27,19 @@
 
 "ui.popup" = { fg = "fujiWhite", bg = "sumiInk0" }
 "ui.window" = { fg = "fujiWhite" }
-"ui.help" = { fg = "fujiWhite", bg = "waveBlue1" }
+"ui.help" = { fg = "fujiWhite", bg = "sumiInk1" }
 "ui.text" = "fujiWhite"
 "ui.text.focus" = { fg = "fujiWhite", bg = "waveBlue1", modifiers = ["bold"] }
 "ui.virtual" = "waveBlue1"
 
-"ui.cursor" = { fg = "fujiWhite", bg = "waveBlue1"}
-"ui.cursor.primary" = { fg = "seaFoam", bg = "waveBlue1" }
+"ui.cursor" = { fg = "waveBlue1", bg = "fujiWhite"}
+"ui.cursor.primary" = { fg = "waveBlue1", bg = "seaFoam" }
 "ui.cursor.match" = { fg = "seaFoam", modifiers = ["bold"] }
 "ui.highlight" = { fg = "fujiWhite", bg = "waveBlue2" }
+"ui.menu" = { fg = "fujiWhite", bg = "sumiInk1" }
+"ui.menu.selected" = { fg = "fujiWhite", bg = "waveBlue1" }
+
+"ui.cursorline.primary" = { bg = "sumiInk3"}
 
 diagnostic = { modifiers = ["underlined"] }
 
@@ -40,6 +48,11 @@ warning = "roninYellow"
 info = "waveAqua1"
 hint = "dragonBlue"
 
+## Git gutter
+"diff.plus" = "autumnGreen"
+"diff.minus" = "autumnRed"
+"diff.delta" = "autumnYellow"
+
 ## Syntax highlighting
 "type" = "waveAqua2"
 "constant" = "surimiOrange"
@@ -54,8 +67,8 @@ hint = "dragonBlue"
 "variable.other.member" = "carpYellow"
 "label" = "springBlue"
 "punctuation" = "springViolet2"
-"punctuation.delimiter" = "springViolet2" 
-"punctuation.bracket" = "springViolet2" 
+"punctuation.delimiter" = "springViolet2"
+"punctuation.bracket" = "springViolet2"
 "keyword" = "oniViolet"
 "keyword.directive" = "peachRed"
 "operator" = "boatYellow2"
@@ -122,4 +135,4 @@ sakuraPink    = "#D27E99" # numbers
 waveRed       = "#E46876" # standout specials 1, e.g. builtin variables
 peachRed      = "#FF5D62" # standout specials 2, e.g. exception handling, returns
 surimiOrange  = "#FFA066" # constants, imports, booleans
-katanaGray    = "#717C7C" # deprecated
+katanaGray    = "#717C7C" # deprecated