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>

app/RSpade/Core/Ajax/Exceptions/AjaxAuthRequiredException.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\RSpade\Core\Ajax\Exceptions;
+
+// @FILE-SUBCLASS-01-EXCEPTION
+
+/**
+ * Exception thrown when an API method requires authentication
+ */
+#[Instantiatable]
+class AjaxAuthRequiredException extends \Exception
+{
+    public function __construct($message = "Authentication Required", $code = 401, \Throwable $previous = null)
+    {
+        parent::__construct($message, $code, $previous);
+    }
+}

app/RSpade/Core/Ajax/Exceptions/AjaxFatalErrorException.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\RSpade\Core\Ajax\Exceptions;
+
+// @FILE-SUBCLASS-01-EXCEPTION
+
+/**
+ * Exception thrown when an API method encounters a fatal error
+ */
+#[Instantiatable]
+class AjaxFatalErrorException extends \Exception
+{
+    public function __construct($message = "Fatal error occurred", $code = 500, \Throwable $previous = null)
+    {
+        parent::__construct($message, $code, $previous);
+    }
+}

app/RSpade/Core/Ajax/Exceptions/AjaxFormErrorException.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\RSpade\Core\Ajax\Exceptions;
+
+// @FILE-SUBCLASS-01-EXCEPTION
+
+/**
+ * Exception thrown when an API method encounters form validation errors
+ *
+ * This exception carries additional metadata about the errors that can be
+ * extracted by the calling code.
+ */
+#[Instantiatable]
+class AjaxFormErrorException extends \Exception
+{
+    protected array $details;
+    
+    public function __construct($message = "Form validation error", array $details = [], $code = 422, \Throwable $previous = null)
+    {
+        parent::__construct($message, $code, $previous);
+        $this->details = $details;
+    }
+    
+    /**
+     * Get the error details/metadata
+     * 
+     * @return array
+     */
+    public function get_details(): array
+    {
+        return $this->details;
+    }
+}

app/RSpade/Core/Ajax/Exceptions/AjaxUnauthorizedException.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\RSpade\Core\Ajax\Exceptions;
+
+// @FILE-SUBCLASS-01-EXCEPTION
+
+/**
+ * Exception thrown when an API method denies access due to authorization
+ */
+#[Instantiatable]
+class AjaxUnauthorizedException extends \Exception
+{
+    public function __construct($message = "Unauthorized", $code = 403, \Throwable $previous = null)
+    {
+        parent::__construct($message, $code, $previous);
+    }
+}