Add Kanagawa theme

Thanks again to @iljo-dp!

themes/alacritty/kanagawa.toml

@@ -0,0 +1,36 @@
+[colors]
+[colors.primary]
+background = '#1f1f28'
+foreground = '#dcd7ba'
+
+[colors.normal]
+black   = '#090618'
+red     = '#c34043'
+green   = '#76946a'
+yellow  = '#c0a36e'
+blue    = '#7e9cd8'
+magenta = '#957fb8'
+cyan    = '#6a9589'
+white   = '#c8c093'
+
+[colors.bright]
+black   = '#727169'
+red     = '#e82424'
+green   = '#98bb6c'
+yellow  = '#e6c384'
+blue    = '#7fb4ca'
+magenta = '#938aa9'
+cyan    = '#7aa89f'
+white   = '#dcd7ba'
+
+[colors.selection]
+background = '#2d4f67'
+foreground = '#c8c093'
+
+[[colors.indexed_colors]]
+index = 16
+color = '#ffa066'
+
+[[colors.indexed_colors]]
+index = 17
+color = '#ff5d62'