Feature/adjust colors contrast tool (#4544)

# Description of Changes

- Addition of the "Adjust Colors/Contrast" tool

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

frontend/src/components/shared/sliderWithInput/SliderWithInput.tsx

@@ -0,0 +1,44 @@
+import React from 'react';
+import { Slider, Text, Group, NumberInput } from '@mantine/core';
+
+interface Props {
+  label: string;
+  value: number;
+  onChange: (value: number) => void;
+  disabled?: boolean;
+  min?: number;
+  max?: number;
+  step?: number;
+}
+
+export default function SliderWithInput({
+  label,
+  value,
+  onChange,
+  disabled,
+  min = 0,
+  max = 200,
+  step = 1,
+}: Props) {
+  return (
+    <div>
+      <Text size="sm" fw={600} mb={4}>{label}: {Math.round(value)}%</Text>
+      <Group gap="sm" align="center">
+        <div style={{ flex: 1 }}>
+          <Slider min={min} max={max} step={step} value={value} onChange={onChange} disabled={disabled} />
+        </div>
+        <NumberInput
+          value={value}
+          onChange={(v) => onChange(Number(v) || 0)}
+          min={min}
+          max={max}
+          step={step}
+          disabled={disabled}
+          style={{ width: 90 }}
+        />
+      </Group>
+    </div>
+  );
+}
+
+