Add unified Xresources theme engine, Default.xth export, and xthemes manager plugin

overlay/rootfs/usr/share/sxmo/appcfg/Xresources

@@ -1,13 +1,61 @@
 ! Space to setup configversion
 ! configversion: 7bff124b2de16292fe6e7a7e5d3322ae
+! Bananarchy Unified Theme: Default
+
+theme.name: Default
+theme.fontFace: Fira Code
+theme.iconFontFace: DejaVuSansM Nerd Font
+theme.baseFontSize: 15
+
+theme.bgMain: #222222
+theme.bgBar: #323232
+theme.bgHeader: #1c1c1c
+theme.bgFooter: #181818
+theme.bgOverlay: #161616
+theme.bgAltEven: #282828
+theme.bgAltOdd: #2e2e2e
+theme.bgInput: #1a1a1a
+theme.bgInputFocus: #1b3b4b
+theme.bgButton: #2a2a2a
+theme.bgSearch: #383838
+theme.bgBubbleIn: #262d32
+theme.bgBubbleOut: #1f2d38
+theme.bgToast: #102535
+
+theme.fgMain: #dddddd
+theme.fgBright: #ffffff
+theme.fgMuted: #999999
+
+theme.selBg: #005577
+theme.selFg: #ffffff
+theme.accent: #f4d03f
+theme.accentAlt: #0088bb
+theme.highlight: #ffc978
+theme.border: #444444
+theme.divider: #666666
+
+theme.success: #2ecc71
+theme.info: #5dade2
+theme.warning: #e67e22
+theme.danger: #e74c3c
+theme.dangerBg: #922b21
 
 dmenu.font: Fira Code:pixelsize=18:style=Regular:antialias=true:autohint=true
 dmenu.background: #1c1c1c
-dmenu.foreground: #e0e0e0
+dmenu.foreground: #ffffff
 dmenu.selbackground: #005577
 dmenu.selforeground: #ffffff
+dmenu.outbackground: #383838
+dmenu.outforeground: #ffffff
+dmenu.highlight: #ffc978
 
 dwm.font: Fira Code, DejaVuSansM Nerd Font 15px
+dwm.background: #323232
+dwm.foreground: #dddddd
+dwm.border: #444444
+dwm.selbackground: #005577
+dwm.selforeground: #ffffff
+dwm.selborder: #005577
 dwm.normbgcolor: #323232
 dwm.normbordercolor: #444444
 dwm.normfgcolor: #dddddd
@@ -18,7 +66,7 @@ dwm.selfgcolor: #ffffff
 st.font: Fira Code:pixelsize=18:style=Regular:antialias=true:autohint=true
 st.termname: xterm-256color
 st.background: #1c1c1c
-st.foreground: #e5e5e5
-st.cursorColor: #cccccc
+st.foreground: #dddddd
+st.cursorColor: #f4d03f
 
 svkbd.font: Fira Code:pixelsize=12