numerous changes

+ fish & bash completions
+ -w/--where option
M moved util_readf to _reve.sh
M linter-detected warnings fixed
M less variable clutter

completions/reve.fish

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+# reve                              desktop environment framework
+# Yigid BALABAN <fyb@fybx.dev>                               2024
+
+function __reve_complete_modes
+    echo "dark"
+    echo "light"
+end
+
+function __reve_complete_reasons
+    echo "time"
+    echo "network"
+end
+
+function __reve_complete_chores
+    ls ~/.config/reve/chores/mode | sed 's/\.sh$//'
+end
+
+complete -c reve -s m -l mode -a '(__reve_complete_modes)' -d 'Specify desktop mode (dark or light)'
+complete -c reve -s r -l reason -a '(__reve_complete_reasons)' -d 'Specify the reason (time or network)'
+complete -c reve -s c -l chore -a '(__reve_complete_chores)' -d 'Specify a chore to run'
+complete -c reve -s w -l where -d 'Display the installation path of reve'
+complete -c reve -s h -l help -d 'Show help message'