Added TrueCharts db tools

Copied from here:
https://truecharts.org/manual/SCALE/guides/sql-export/

Link to source of page:
https://github.com/truecharts/website/blame/main/docs/manual/SCALE/guides/sql-export.md#L13

Permalink in space/time:
https://github.com/truecharts/website/blame/30484d04f7079d43e7948e267f894954c936c1db/docs/manual/SCALE/guides/sql-export.md#L13

tcdbinfo.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+# get namespaces
+namespaces=$(k3s kubectl get secrets -A | grep -E "dbcreds|cnpg-main-urls" | awk '{print $1, $2}')
+
+# iterate over namespaces
+( printf "Application | Username | Password | Address | Port\n"
+echo "$namespaces" | while read ns secret; do
+    # extract application name
+    app_name=$(echo "$ns" | sed 's/^ix-//')
+    if [ "$secret" = "dbcreds" ]; then
+        creds=$(k3s kubectl get secret/$secret --namespace "$ns" -o jsonpath='{.data.url}' | base64 -d)
+    else
+        creds=$(k3s kubectl get secret/$secret --namespace "$ns" -o jsonpath='{.data.std}' | base64 -d)
+    fi
+    
+    # get username, password, addresspart, and port
+    username=$(echo "$creds" | awk -F '//' '{print $2}' | awk -F ':' '{print $1}')
+    password=$(echo "$creds" | awk -F ':' '{print $3}' | awk -F '@' '{print $1}')
+    addresspart=$(echo "$creds" | awk -F '@' '{print $2}' | awk -F ':' '{print $1}')
+    port=$(echo "$creds" | awk -F ':' '{print $4}' | awk -F '/' '{print $1}')
+
+    # construct full address
+    full_address="${addresspart}.${ns}.svc.cluster.local"
+
+    # print results with aligned columns
+    printf "%s | %s | %s | %s | %s\n" "$app_name" "$username" "$password" "$full_address" "$port"
+done ) | column -t -s "|"