themes: add a couple of color themes

Foot doesn't really support themes, but with this, users can at least
copy-paste from a couple of predefined themes into their footrc.

themes/derp

@@ -0,0 +1,24 @@
+# Derp
+
+[cursor]
+color=000000 ffffff
+
+[colors]
+foreground=ffffff
+background=000000
+regular0=111111
+regular1=d36265
+regular2=aece91
+regular3=e7e18c
+regular4=5297cf
+regular5=963c59
+regular6=5e7175
+regular7=bebebe
+bright0=666666
+bright1=ef8171
+bright2=cfefb3
+bright3=fff796
+bright4=74b8ef
+bright5=b85e7b
+bright6=a3babf
+bright7=ffffff

themes/gruvbox-dark

@@ -0,0 +1,21 @@
+# Gruvbox
+
+[colors]
+background=282828
+foreground=ebdbb2
+regular0=282828
+regular1=cc241d
+regular2=98971a
+regular3=d79921
+regular4=458588
+regular5=b16286
+regular6=689d6a
+regular7=a89984
+bright0=928374
+bright1=fb4934
+bright2=b8bb26
+bright3=fabd2f
+bright4=83a598
+bright5=d3869b
+bright6=8ec07c
+bright7=ebdbb2

themes/solarized-dark

@@ -0,0 +1,24 @@
+# Solarized dark
+
+[cursor]
+color= 002b36 93a1a1
+
+[colors]
+background=              002b36
+foreground=              839496
+regular0=                073642
+regular1=                dc322f
+regular2=                859900
+regular3=                b58900
+regular4=                268bd2
+regular5=                d33682
+regular6=                2aa198
+regular7=                eee8d5
+bright0=                 002b36
+bright1=                 cb4b16
+bright2=                 586e75
+bright3=                 657b83
+bright4=                 839496
+bright5=                 6c71c4
+bright6=                 93a1a1
+bright7=                 fdf6e3

themes/solarized-light

@@ -0,0 +1,24 @@
+# Solarized light
+
+[cursor]
+color=fdf6e3 586e75
+
+[colors]
+background=              fdf6e3
+foreground=              657b83
+regular0=                eee8d5
+regular1=                dc322f
+regular2=                859900
+regular3=                b58900
+regular4=                268bd2
+regular5=                d33682
+regular6=                2aa198
+regular7=                073642
+bright0=                 cb4b16
+bright1=                 fdf6e3
+bright2=                 93a1a1
+bright3=                 839496
+bright4=                 657b83
+bright5=                 6c71c4
+bright6=                 586e75
+bright7=                 002b36

themes/tango

@@ -0,0 +1,24 @@
+# Tango
+
+[cursor]
+color=000000 babdb6
+
+[colors]
+foreground=babdb6
+background=000000
+regular0=2e3436
+regular1=cc0000
+regular2=4e9a06
+regular3=c4a000
+regular4=3465a4
+regular5=75507b
+regular6=06989a
+regular7=d3d7cf
+bright0=555753
+bright1=ef2929
+bright2=8ae234
+bright3=fce94f
+bright4=729fcf
+bright5=ad7fa8
+bright6=34e2e2
+bright7=eeeeec

themes/visibone

@@ -0,0 +1,24 @@
+# VisiBone
+
+[cursor]
+color=010101 ffffff
+
+[colors]
+foreground=ffffff
+background=010101
+regular0=666666
+regular1=cc6666
+regular2=66cc99
+regular3=cc9966
+regular4=6699cc
+regular5=cc6699
+regular6=66cccc
+regular7=cccccc
+bright0=999999
+bright1=ff9999
+bright2=99ffcc
+bright3=ffcc99
+bright4=99ccff
+bright5=ff99cc
+bright6=99ffff
+bright7=ffffff