fix: support standalone Filament usage without panel dependency

Replace `filament/filament` (full panel) requirement with individual
sub-packages (actions, forms, schemas, support, tables). This allows
the package to be installed in projects using standalone Filament
components without triggering NoDefaultPanelSetException.

Panel-specific classes (BoardPage, BoardResourcePage, FlowforgePlugin)
remain available but are only autoloaded when explicitly used.

Closes #84

Author: ManukMinasyan

composer.json

@@ -21,11 +21,19 @@
     ],
     "require": {
         "php": "^8.3",
-        "filament/filament": "^5.0",
+        "filament/actions": "^5.0",
+        "filament/forms": "^5.0",
+        "filament/schemas": "^5.0",
+        "filament/support": "^5.0",
+        "filament/tables": "^5.0",
         "spatie/laravel-package-tools": "^1.15.0",
         "ext-bcmath": "*"
     },
+    "suggest": {
+        "filament/filament": "Required for BoardPage, BoardResourcePage, and FlowforgePlugin panel integration (^5.0)"
+    },
     "require-dev": {
+        "filament/filament": "^5.0",
         "larastan/larastan": "^3.0",
         "laravel/pint": "^1.0",
         "nunomaduro/collision": "^8.0",

src/BoardPage.php

@@ -14,6 +14,11 @@
 /**
  * Board page for standard Filament pages.
  * Extends Filament's base Page class with kanban board functionality.
+ *
+ * Requires the `filament/filament` package (Panel Builder).
+ * For standalone usage, use the InteractsWithBoard trait directly.
+ *
+ * @see \Relaticle\Flowforge\Concerns\InteractsWithBoard
  */
 abstract class BoardPage extends Page implements HasActions, HasBoard, HasForms
 {

src/BoardResourcePage.php

@@ -16,10 +16,15 @@
  * Board page for Filament resource pages.
  * Extends Filament's resource Page class with kanban board functionality.
  *
+ * Requires the `filament/filament` package (Panel Builder).
+ * For standalone usage, use the InteractsWithBoard trait directly.
+ *
  * CRITICAL: This class doesn't use InteractsWithRecord trait itself, but child
  * classes might. To handle the trait conflict, we override getDefaultActionRecord()
  * to intelligently route to either board card records or resource records based
  * on whether a recordKey is present in the mounted action context.
+ *
+ * @see \Relaticle\Flowforge\Concerns\InteractsWithBoard
  */
 abstract class BoardResourcePage extends Page implements HasActions, HasBoard, HasForms
 {

src/FlowforgePlugin.php

@@ -6,8 +6,15 @@
 use Filament\Panel;
 use Livewire\Livewire;
 
-// use Relaticle\Flowforge\Livewire\KanbanBoard;
-
+/**
+ * Filament Panel plugin for FlowForge.
+ *
+ * This class requires the full `filament/filament` package (Panel Builder).
+ * For standalone Livewire usage without a panel, use the InteractsWithBoard
+ * trait directly on your Livewire component instead.
+ *
+ * @see \Relaticle\Flowforge\Concerns\InteractsWithBoard
+ */
 class FlowforgePlugin implements Plugin
 {
     public function getId(): string