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

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

node_modules/postcss-calc/src/index.js

@@ -0,0 +1,51 @@
+'use strict';
+const transform = require('./lib/transform.js');
+
+/**
+ * @typedef {{precision?: number | false,
+ *          preserve?: boolean,
+ *          warnWhenCannotResolve?: boolean,
+ *          mediaQueries?: boolean,
+ *          selectors?: boolean}} PostCssCalcOptions
+ */
+/**
+ * @type {import('postcss').PluginCreator<PostCssCalcOptions>}
+ * @param {PostCssCalcOptions} opts
+ * @return {import('postcss').Plugin}
+ */
+function pluginCreator(opts) {
+  const options = Object.assign(
+    {
+      precision: 5,
+      preserve: false,
+      warnWhenCannotResolve: false,
+      mediaQueries: false,
+      selectors: false,
+    },
+    opts
+  );
+
+  return {
+    postcssPlugin: 'postcss-calc',
+    OnceExit(css, { result }) {
+      css.walk((node) => {
+        const { type } = node;
+        if (type === 'decl') {
+          transform(node, 'value', options, result);
+        }
+
+        if (type === 'atrule' && options.mediaQueries) {
+          transform(node, 'params', options, result);
+        }
+
+        if (type === 'rule' && options.selectors) {
+          transform(node, 'selector', options, result);
+        }
+      });
+    },
+  };
+}
+
+pluginCreator.postcss = true;
+
+module.exports = pluginCreator;