[modules/apt] Add APT update checking module

themes/icons/ascii.json

@@ -6,6 +6,7 @@
 	"cpu": { "prefix": "cpu" },
 	"disk": { "prefix": "hdd" },
 	"dnf": { "prefix": "dnf" },
+	"apt": { "prefix": "apt" },
 	"brightness": { "prefix": "o" },
 	"cmus": {
 		"playing": { "prefix": ">" },

themes/icons/awesome-fonts.json

@@ -10,6 +10,7 @@
 	"cpu": { "prefix": "" },
 	"disk": { "prefix": "" },
 	"dnf": { "prefix": "" },
+	"apt": { "prefix": "" },
 	"pacman": { "prefix": "" },
 	"brightness": { "prefix": "" },
 	"load": { "prefix": "" },

themes/icons/ionicons.json

@@ -10,6 +10,7 @@
 	"cpu": { "prefix": "\uf4b0" },
 	"disk": { "prefix": "\u26c1" },
 	"dnf": { "prefix": "\uf2be" },
+	"apt": { "prefix": "\uf2be" },
 	"pacman": { "prefix": "\uf2be" },
 	"brightness": { "prefix": "\u263c" },
 	"load": { "prefix": "\uf13d" },