starship: add custom Harelang module

shows currently installed version of Hare

check out https://harelang.org/

.config/starship.toml

@@ -172,3 +172,14 @@ format = "[$symbol]($style) "
 [zig]
 disabled = false
 format = "[$symbol]($style)"
+
+[custom.hare]
+disabled = false
+# check out https://harelang.org/
+description = "The currently installed version of Harelang"
+detect_extensions = ["ha"]
+# since there is no hare emoji so far, the one for rabbit is used
+symbol = "🐰 "
+command = "hare version | cut -f 2 -d ' '"
+style = "dimmed bold bright-black"
+format = "$symbol[($output)]($style) "