content: classify all finds and reviews into the topics vocabulary

864 finds + 64 reviews assigned 1-3 topics each from the new 18-topic
controlled vocabulary (src/lib/topics.ts, lands in the next site
commit). The retired gifts topic becomes a giftable tag on the 140
finds that carried it; 5 finds legitimately match no topic.

Claude-Session: https://claude.ai/code/session_01WZaczDJjL3xZ3u5spsN5AL

src/content/find/2026/05/apex-markdown-processor/index.mdx

@@ -4,9 +4,7 @@ subtitle: "One Markdown tool that renders every dialect — and shows images in
 date: 2026-05-04
 link: "https://github.com/ApexMarkdown/apex"
 source: "Brett Terpstra"
-topics:
-  - macos-apps
-  - apple-tips
+topics: [cli-and-automation, writing-and-notes]
 tags: [markdown, terminal, cli, writing, brett-terpstra]
 description: "Brett Terpstra's Markdown processor that combines CommonMark, GFM, MultiMarkdown, Kramdown, and Marked features in one tool — and renders inline images directly in the terminal via ANSI."
 promotedTo: "apex-markdown-processor"