docs: reorganize usage page by service type

usage.md

@@ -1,38 +1,48 @@
 # Warden Usage
 
-## Common Commands
+## Environment Management
 
-Launch a shell session within the project environment's `php-fpm` container:
+Starting a stopped environment:
 
-    warden shell
+    warden env start
 
 Stopping a running environment:
 
     warden env stop
 
-Starting a stopped environment:
+Display the resolved environment configuration in `docker-compose` format:
 
-    warden env start
+    warden env config
 
-Import a database (if you don't have `pv` installed, use `cat` instead):
+Tail environment nginx and php logs:
 
-    pv /path/to/dump.sql.gz | gunzip -c | warden db import
+    warden env logs --tail 0 -f nginx php-fpm php-debug
 
-Monitor database processlist:
+Remove volumes completely:
 
-    watch -n 3 "warden db connect -A -e 'show processlist'"
+    warden env down -v
 
-Tail environment nginx and php logs:
+## Shell Access
 
-    warden env logs --tail 0 -f nginx php-fpm php-debug
+Launch a shell session within the project environment's `php-fpm` container:
 
-Tail the varnish activity log:
+    warden shell
 
-    warden env exec -T varnish varnishlog
+Launch a debug-enabled shell (Xdebug) session:
 
-Flush varnish:
+    warden debug
+
+## Database
+
+Import a database (if you don't have `pv` installed, use `cat` instead):
+
+    pv /path/to/dump.sql.gz | gunzip -c | warden db import
+
+Monitor database processlist:
+
+    watch -n 3 "warden db connect -A -e 'show processlist'"
 
-     warden env exec -T varnish varnishadm 'ban req.url ~ .' 
+## Redis / Valkey
 
 Connect to redis/valkey:
 
@@ -44,15 +54,23 @@ Flush redis/valkey completely:
     warden redis flushall
     warden valkey flushall
 
-Run redis continuous stat mode
+Run redis continuous stat mode:
 
     warden redis --stat
 
-Remove volumes completely:
+## Varnish
 
-    warden env down -v
+Tail the varnish activity log:
+
+    warden env exec -T varnish varnishlog
+
+Flush varnish:
+
+     warden env exec -T varnish varnishadm 'ban req.url ~ .'
+
+## Troubleshooting
 
-Warden troubleshooting and debug information
+Warden troubleshooting and debug information:
 
     warden doctor