Integrate Elasticsearch to Enhance Search Functionality

Currently, our search functionality is limited to matching user queries with a pre-generated [index.json file](https://btctranscripts.com/index.json). [This file is created](https://github.com/bitcointranscripts/bitcointranscripts.github.io/blob/master/themes/ace-documentation/layouts/_default/list.index.json) during the build process and includes the titles and first 500 characters of each transcript. While this method provides basic search capabilities, it does not allow for comprehensive or highly relevant search results.

To improve this, we can leverage our existing Elasticsearch infrastructure, which is already in use for indexing all transcripts for [bitcoinsearch](https://github.com/bitcoinsearch/bitcoinsearch-app). This search approach is already implemented in [Bitcoin TLDR](https://github.com/bitcoinsearch/bitcoinsearch-app).