perf: bundle yaml from its ES module build

.changeset/bundle-yaml-esm.md

@@ -0,0 +1,5 @@
+---
+'@tanstack/intent': patch
+---
+
+Make the installed package 28 kB smaller by bundling `yaml` from its ES module build instead of its CommonJS build. A YAML warning, such as an unresolved tag in skill frontmatter, is now written to stderr by `console.warn`, with a stack trace; before, it went through `process.emitWarning`, and `intent list` and `intent stale` exited before Node printed it. The `LOG_STREAM` and `LOG_TOKENS` environment variables no longer make the YAML parser print its tokens to stdout.

packages/intent/tsdown.config.ts

@@ -61,5 +61,10 @@ export default defineConfig({
     'jsonc-parser': fileURLToPath(
       new URL('./node_modules/jsonc-parser/lib/esm/main.js', import.meta.url),
     ),
+    // yaml's `node` export condition is a CommonJS build that rolldown cannot
+    // tree-shake; point at the ES module build its `default` condition serves.
+    yaml: fileURLToPath(
+      new URL('./node_modules/yaml/browser/index.js', import.meta.url),
+    ),
   },
 })