Fix bin/publish: copy docs.dist from project root

Fix bin/publish: use correct .env path for rspade_system
Fix bin/publish script: prevent grep exit code 1 from terminating script

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Co-Authored-By: Claude <noreply@anthropic.com>

node_modules/postcss-merge-longhand/src/lib/parseTrbl.js

@@ -0,0 +1,12 @@
+'use strict';
+const { list } = require('postcss');
+/** @type {(v: string | string[]) => [string, string, string, string]} */
+module.exports = (v) => {
+  const s = typeof v === 'string' ? list.space(v) : v;
+  return [
+    s[0], // top
+    s[1] || s[0], // right
+    s[2] || s[0], // bottom
+    s[3] || s[1] || s[0], // left
+  ];
+};