docs: add templates vars section and --wait flag

- Document core vm templates vars command
- Add --wait flag example for php deploy

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/cmd/php/index.md

@@ -84,6 +84,9 @@ core php deploy
 # Deploy to staging
 core php deploy --staging
 
+# Wait for completion
+core php deploy --wait
+
 # Check deployment status
 core php deploy:status
 

docs/cmd/vm/templates/index.md

@@ -78,6 +78,28 @@ Services:
 Size: ~1.8GB
 ```
 
+## templates vars
+
+Show variables defined by a template.
+
+```bash
+core vm templates vars <name>
+```
+
+### Example
+
+```bash
+core vm templates vars core-dev
+```
+
+Output:
+```
+Variables for core-dev:
+  SSH_KEY      (required)  SSH public key
+  MEMORY       (optional)  Memory in MB (default: 4096)
+  CPUS         (optional)  CPU count (default: 4)
+```
+
 ## Template Locations
 
 Templates are searched in order: