Update IndexedDB Handling and Enhance App Functionality

- Modified the NostrClient's publish method to allow for specific relay usage and added event storage in IndexedDB.
- Introduced a debug function for IndexedDB to inspect stored events and their counts by kind.
- Updated the App.svelte component to expose the debug function globally for easier access during development.
- Enhanced the CSS styles for better user feedback on export results and status messages.
- Incremented the IndexedDB version to accommodate new indexes and improve event storage management.
- Updated the version number to v0.19.1.

.gitignore

@@ -99,6 +99,13 @@ cmd/benchmark/data
 !.github/**
 !.github/workflows/**
 !app/web/dist/**
+!app/web/dist/*.js
+!app/web/dist/*.js.map
+!app/web/dist/*.css
+!app/web/dist/*.html
+!app/web/dist/*.ico
+!app/web/dist/*.png
+!app/web/dist/*.svg
 # ...even if they are in subdirectories
 !*/
 /blocklist.json