docs: humanize documentation and update architecture

- content/about.md: Rewrite with first-person voice, remove
  "next-generation" and "craft tools that emphasize" patterns.
  Add personality ("probably more than it should").

- content/collab.md: More direct language, remove "find value in"
  and "broader community" hedging. Shorter bullet lists.

- AGENTS.md: Remove "state-of-the-art", update architecture tree
  to reflect current modules (config, feed, templates), fix
  stale config section to show actual site.toml usage.

netlify.toml

@@ -1,11 +1,11 @@
 # Netlify build configuration for nrd.sh
 
 [build]
-  command = "cargo build --release && ./target/release/nrd-sh"
-  publish = "public"
+command = "cargo build --release && ./target/release/nrd-sh"
+publish = "public"
 
 [build.environment]
-  RUST_VERSION = "1.84"
+RUST_VERSION = "1.84"
 
 # Redirect clean URLs (optional, for server-side routing)
 # Not needed since we use .html extensions