feat(frontend): refactor ToolStep props handling and children usage (#4524)

# Description of Changes

- Replaced `children` being passed as a prop to `React.createElement`
with proper usage as additional arguments (fixes
`react/no-children-prop` warning).
- Added stricter handling of `isVisible` and `_excludeFromCount` props
with improved variable naming (`stepProps`) for clarity.
- Refactored JSX structure for collapsed/expanded rendering logic to
improve readability.

This change was made to clean up prop handling, remove ESLint warnings,
and make the component more consistent with React best practices.

---

## 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.

---------

Co-authored-by: Reece Browne <74901996+reecebrowne@users.noreply.github.com>

frontend/src/components/tools/shared/ToolStep.tsx

@@ -164,13 +164,16 @@ export function createToolSteps() {
     const isVisible = props.isVisible !== false;
     const currentStepNumber = isVisible ? stepNumber++ : undefined;
 
-    const step = React.createElement(ToolStep, {
-      ...props,
-      title,
-      _stepNumber: currentStepNumber,
-      children,
-      key: `step-${title.toLowerCase().replace(/\s+/g, '-')}`
-    });
+    const step = React.createElement(
+      ToolStep,
+      {
+        ...props,
+        title,
+        _stepNumber: currentStepNumber,
+        key: `step-${title.toLowerCase().replace(/\s+/g, '-')}`
+      },
+      children
+    );
 
     steps.push(step);
     return step;
@@ -186,9 +189,9 @@ export function createToolSteps() {
 
   const getVisibleCount = () => {
     return steps.filter(step => {
-      const props = step.props as ToolStepProps;
-      const isVisible = props.isVisible !== false;
-      const excludeFromCount = props._excludeFromCount === true;
+      const stepProps = step.props as ToolStepProps;
+      const isVisible = stepProps.isVisible !== false;
+      const excludeFromCount = stepProps._excludeFromCount === true;
       return isVisible && !excludeFromCount;
     }).length;
   };
@@ -203,9 +206,9 @@ export function ToolStepProvider({ children, forceStepNumbers }: { children: Rea
     let count = 0;
     React.Children.forEach(children, (child) => {
       if (React.isValidElement(child) && child.type === ToolStep) {
-        const props = child.props as ToolStepProps;
-        const isVisible = props.isVisible !== false;
-        const excludeFromCount = props._excludeFromCount === true;
+        const stepProps = child.props as ToolStepProps;
+        const isVisible = stepProps.isVisible !== false;
+        const excludeFromCount = stepProps._excludeFromCount === true;
         if (isVisible && !excludeFromCount) count++;
       }
     });