Refactor HTML templates for improved readability and consistency

- Updated search_results_table.html to enhance formatting and maintain consistent indentation.
- Refined search_results.html layout for better structure and clarity.
- Improved upload.html for better organization and readability of the upload form and data source table.
- Removed unnecessary lines in package.json and streamlined devDependencies section.

.editorconfig

@@ -18,8 +18,8 @@ indent_size = 4
 
 # HTML and Django/Jinja2 template files
 [*.{html,htm}]
-indent_style = tab
-indent_size = 4
+indent_size = 2
+
 # Allow prettier to format Django/Jinja templates properly
 # The following comment options can be used in individual files if needed:
 # <!-- prettier-ignore -->