Fiddle: add maxWidth to ContainingView

[krishan711]

Description

Screenshots:

Checklist:

• I have updated the CHANGELOG with a summary of my changes
• I have updated the documentation accordingly

[Copilot]

Pull request overview

This PR adds a maxWidth prop to the ContainingView wrapper component, allowing developers to override the default maximum width (--kiba-screen-width-max) with a custom value.

Changes:

• Added maxWidth prop to IContainingViewProps interface
• Updated component logic to use custom maxWidth when provided, falling back to CSS variable
• Updated CHANGELOG with MINOR version entry

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/wrappers/containingView/component.tsx	Added optional maxWidth prop to interface and implementation to allow custom maximum width override
CHANGELOG.md	Documented the new maxWidth prop as a MINOR change

[Copilot]

The new maxWidth prop needs a Storybook story example demonstrating its usage. According to CONTRIBUTING.md: "Every component must be documented, and every variant must have a story example."

Consider adding a story that shows how to use a custom maxWidth value, for example:

export const CustomMaxWidth: Story = {
  render: (args) => (
    <ContainingView {...args}>
      <Box variant='card'>
        <Text>Content constrained to custom width</Text>
      </Box>
    </ContainingView>
  ),
  args: {
    maxWidth: '500px',
  },
};

This will help users discover and understand how to use the maxWidth prop.