fix: quote CLAUDE_PLUGIN_ROOT in hook commands to support paths with spaces (awslabs#212)

The aws-serverless and deploy-on-aws hooks passed ${CLAUDE_PLUGIN_ROOT}
directly to /bin/sh -c without quoting or a bash prefix. When
CLAUDE_CONFIG_DIR contains a space (e.g. /Users/me/Work/Company Name/),
the shell word-splits the path and the hook fails on every Edit/Write
with:

    /bin/sh: /Users/me/Work/Company: is a directory

Wrap the interpolated path in escaped double quotes and prefix with
bash, matching the pattern used by superpowers in
anthropics/claude-plugins-official. Applied the same pattern to the
databases-on-aws scripts README example so users don't copy the
broken form.

Closes awslabs#146

Co-authored-by: Scott Schreckengaust <scottschreckengaust@users.noreply.github.com>

Author: Sagargupta16

plugins/aws-serverless/hooks/hooks.json

@@ -6,7 +6,7 @@
         "hooks": [
           {
             "type": "command",
-            "command": "${CLAUDE_PLUGIN_ROOT}/scripts/validate-template.sh",
+            "command": "bash \"${CLAUDE_PLUGIN_ROOT}/scripts/validate-template.sh\"",
             "timeout": 120
           }
         ]

plugins/databases-on-aws/scripts/README.md

@@ -47,7 +47,7 @@ Add additional hooks to `.claude/settings.json` or override the defaults:
         "hooks": [
           {
             "type": "command",
-            "command": "${CLAUDE_PLUGIN_ROOT}/scripts/cluster-info.sh $CLUSTER --region $REGION 2>/dev/null || true"
+            "command": "bash \"${CLAUDE_PLUGIN_ROOT}/scripts/cluster-info.sh\" \"$CLUSTER\" --region \"$REGION\" 2>/dev/null || true"
           }
         ]
       }

plugins/deploy-on-aws/hooks/hooks.json

@@ -6,7 +6,7 @@
         "hooks": [
           {
             "type": "command",
-            "command": "${CLAUDE_PLUGIN_ROOT}/scripts/validate-drawio.sh",
+            "command": "bash \"${CLAUDE_PLUGIN_ROOT}/scripts/validate-drawio.sh\"",
             "timeout": 30
           }
         ]