[4.x] Add Deferred Filters Support for Chart Widget

[mmuqiitf]

Description

This PR introduces the ability to define deferred filter schemas for ChartWidget using the standard Filament Schema builder. Previously, chart widgets only supported automatically filter.

Changelog:

• Optional Deferred Filtering: A new $hasDeferredFilters toggle (default false). When enabled, the chart only updates when an "Apply" button is clicked, improving performance for complex queries.
• Reset Logic: A "Reset" link that restores all filter values to their schema-defined defaults.
• Customizable Actions: Methods to customize labels, colors, and behavior of the Apply and Reset actions.
• Count Filters: Display count active filters in a badge

Example Usage:

class MyChart extends ChartWidget
{
    use HasFiltersSchema;

    protected bool $hasDeferredFilters = true;

    protected function getType(): string
    {
        return 'line';
    }

    public function filtersSchema(Schema $schema): Schema
    {
        return $schema
            ->components([
                Select::make('period')
                    ->options([
                        '7' => 'Last 7 days',
                        '14' => 'Last 14 days',
                        '30' => 'Last 30 days',
                        '60' => 'Last 60 days',
                        '90' => 'Last 90 days',
                    ])
                    ->default('30')
                    ->native(false),

                Select::make('status')
                    ->options([
                        'all' => 'All Statuses',
                        'pending' => 'Pending',
                        'in_progress' => 'In Progress',
                        'completed' => 'Completed',
                        'cancelled' => 'Cancelled',
                    ])
                    ->default('all')
                    ->native(false),

                Select::make('priority')
                    ->options([
                        'all' => 'All Priorities',
                        'low' => 'Low',
                        'medium' => 'Medium',
                        'high' => 'High',
                        'urgent' => 'Urgent',
                    ])
                    ->default('all')
                    ->native(false),

                Select::make('group_by')
                    ->label('Group By')
                    ->options([
                        'day' => 'Day',
                        'week' => 'Week',
                        'month' => 'Month',
                    ])
                    ->default('day')
                    ->native(false),

                DatePicker::make('date_from')
                    ->label('Custom From Date')
                    ->maxDate(fn () => $this->filters['date_to'] ?? now())
                    ->native(false),

                DatePicker::make('date_to')
                    ->label('Custom To Date')
                    ->minDate(fn () => $this->filters['date_from'] ?? null)
                    ->maxDate(now())
                    ->native(false),
            ]);
    }

    protected function getData(): array
    {
        $status = $this->filters['status'] ?? 'all';
        $priority = $this->filters['priority'] ?? 'all';
        $period = (int) ($this->filters['period'] ?? 30);
        $dateFrom = $this->filters['date_from'] ?? null;
        $dateTo = $this->filters['date_to'] ?? null;
        $groupBy = $this->filters['group_by'] ?? 'day';
         
        // ......
     }
}

Visual changes

Implemented additional button "Apply" & "Reset" at footer.

Functional changes

• Code style has been fixed by running the composer cs command.
• Changes have been tested to not break existing functionality.
• Documentation is up-to-date.