install: better discord install + fix broken links

Take any number of inputs
Hardcode some custom clients
For some reason test -e doesnt count broken links as existing idk why

install/discord.fish

@@ -1,16 +1,10 @@
 #!/bin/fish
 
-if test -z "$argv[1]"
-    echo 'Usage: caelestia install discord <client_config_folder_name>'
-    exit 1
-end
-
 . (dirname (status filename))/util.fish
 
 install-deps git
 install-optional-deps 'arrpc (rich presence)'
 
-set -l client $CONFIG/$argv[1]
 set -l dist $C_DATA/discord
 
 # Update/Clone repo
@@ -19,7 +13,13 @@ update-repo discord $dist
 # Install systemd service
 setup-systemd-monitor discord $dist
 
-# Link themes to client config
-install-link $dist/themes $client/themes
+# Link themes to client configs
+set -l clients discord vesktop equibop legcord $argv
+for client in $clients
+    if test -d $CONFIG/$client
+        log "Linking themes for $client"
+        install-link $dist/themes $CONFIG/$client/themes
+    end
+end
 
 log 'Done.'