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>

stubs/cast.stub

@@ -0,0 +1,36 @@
+<?php
+
+namespace {{ namespace }};
+
+use Illuminate\Contracts\Database\Eloquent\CastsAttributes;
+
+class {{ class }} implements CastsAttributes
+{
+    /**
+     * Cast the given value.
+     *
+     * @param  \Illuminate\Database\Eloquent\Model  $model
+     * @param  string  $key
+     * @param  mixed  $value
+     * @param  array  $attributes
+     * @return mixed
+     */
+    public function get($model, string $key, $value, array $attributes)
+    {
+        return $value;
+    }
+
+    /**
+     * Prepare the given value for storage.
+     *
+     * @param  \Illuminate\Database\Eloquent\Model  $model
+     * @param  string  $key
+     * @param  mixed  $value
+     * @param  array  $attributes
+     * @return mixed
+     */
+    public function set($model, string $key, $value, array $attributes)
+    {
+        return $value;
+    }
+}