feat: enhance podcast functionality and build pipeline

- Dynamically resolve image paths for podcast episodes in `episodes.11tydata.js`
- Add podcast metadata handling with inferred URLs for MP3 and transcripts
- Introduce search functionality with Lunr.js and a search index generator
- Update Eleventy path prefix handling to support environment variable override
- Add `.mp4` files to `.gitignore`
- Expand VSCode settings to include Markdown-Eleventy support and improved terminal history
- Add deployment script (`deploy.sh`) with remote rsync-based deployment and permission handling
- Adjust episode layout to use dynamic image paths and updated podcast metadata
- Add search and members page updates, including new URLs and search integration
- Update dependencies to include `html-to-text` and related packages for search indexing

content/episodes/search-index.11ty.js

@@ -0,0 +1,23 @@
+import markdownit from 'markdown-it';
+import { convert } from 'html-to-text';
+const md = markdownit({html: true})
+
+class SearchIndex {
+  data() {
+    return {eleventyExcludeFromCollections:["episode"], layout: null}
+  }
+
+  render (data) {
+    const documents = data.collections.episode.map((episode)=>{
+    return {
+      url:`${this.url(episode.url)}`,
+      title: episode.data.title,
+      text: convert (episode.content),
+      season: episode.data.season,
+      episode: episode.data.episode
+    }})
+    return JSON.stringify(documents);
+  }
+}
+
+export default SearchIndex