armbian-next: hopefully improved error logging; avoid logging errors up to 3x; subdued red stacktraces

- reorg `display_alert()` so more frequent levels are handled first
- improve some ANSI color usage, still a mess
- don't write failed commands stackstrace as warnings to screen -- just to file (yes it's redundant, except if in test)
- more useful / subdued stacktraces, to make actual error more obvious...

lib/functions/logging/logging.sh

@@ -15,6 +15,9 @@ function logging_init() {
 	# globals
 	declare -g padding="" left_marker="[" right_marker="]"
 	declare -g normal_color="\x1B[0m" gray_color="\e[1;30m" # "bright black", which is grey
+	declare -g bright_red_color="\e[1;31m" red_color="\e[0;31m"
+	declare -g bright_blue_color="\e[1;34m" blue_color="\e[0;34m"
+	declare -g bright_magenta_color="\e[1;35m" magenta_color="\e[0;35m"
 	declare -g -i logging_section_counter=0                 # -i: integer
 	declare -g tool_color="${gray_color}"                   # default to gray... (should be ok on terminals, @TODO: I've seen it too dark on a few random screenshots though
 	if [[ "${CI}" == "true" ]]; then                        # ... but that is too dark for Github Actions