fix: ensure parent directories are created for ssh, docker, and kube mounts (#446)

This commit fixes the directory creation to match the volume mount paths,
ensuring Docker finds the correct directories instead of creating them.

Changes:
- Fixed ssh directory: .ssh → ssh/.ssh (creates parent folder)
- Fixed docker directory: .docker → docker/.docker (creates parent folder)
- Fixed kube directory: .kube → kube/.kube (creates parent folder)

This ensures all mount paths have their parent directories created before
Docker tries to mount them, preventing Docker from auto-creating directories
at incorrect locations.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Mohsin Hashmi <mhashmi@wiser.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: 3 people

.coder/template.tf

@@ -65,9 +65,9 @@ resource "null_resource" "host_directories" {
       mkdir -p "$BASE_DIR/claude/.claude"  # Claude data directory
       mkdir -p "$BASE_DIR/gemini/.gemini"  # Gemini data directory
       mkdir -p "$BASE_DIR/.config/gh"
-      mkdir -p "$BASE_DIR/.ssh"
-      mkdir -p "$BASE_DIR/.docker"
-      mkdir -p "$BASE_DIR/.kube"
+      mkdir -p "$BASE_DIR/ssh/.ssh"        # SSH config and keys
+      mkdir -p "$BASE_DIR/docker/.docker"  # Docker credentials
+      mkdir -p "$BASE_DIR/kube/.kube"      # Kubernetes config
       mkdir -p "$BASE_DIR/bash_history"
       mkdir -p "$BASE_DIR/gitconfig"