Add run-relay-and-seed.sh script, remove redundant JS library mappings, and improve logging consistency.

- Introduced `scripts/run-relay-and-seed.sh` to simplify relay testing and Market seeding.
- Removed `.idea/jsLibraryMappings.xml` as it is no longer required.
- Enhanced consistency by reintroducing relevant debug logs and removing redundant comments.

.idea/jsLibraryMappings.xml

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="JavaScriptLibraryMappings">
-    <file url="file://$PROJECT_DIR$/../github.com/jumble" libraries="{jumble/node_modules}" />
-    <file url="file://$PROJECT_DIR$/../github.com/mleku/jumble" libraries="{jumble/node_modules}" />
-  </component>
-</project>