Document the error-handling component contract and props

[mikewheeleer]

Document error-handling

Description

The error-handling component's props and usage are undocumented, leading to inconsistent use. This issue adds a concise reference.

Requirements and context

• Repository scope: StableRoute-Org/Stableroute-frontend only.
• Add a docs entry covering error-handling's props, states, and a minimal usage example.
• Keep it accurate to the current API; read the component first.
• Link from the docs index if one exists.

Suggested execution

• Fork the repo and create a branch
• git checkout -b docs/error-handling-01-component
• Implement changes
  • Write code in: the relevant module.
  • Write comprehensive tests in: cover the new behaviour and edge cases.
• Test and commit

Test and commit

• Run npm run lint, npm test, and npm run build.
• Cover edge cases: n/a — verify props against source.
• Include the full test output in the PR description.

Example commit message

docs(error-handling): document component contract

Guidelines

• Minimum 95 percent test coverage for impacted modules.
• Clear, reviewer-focused documentation.
• Timeframe: 96 hours.

Community & contribution rewards

• 💬 Join the StableRoute community on Discord: https://discord.gg/37aCpusvx
• ⭐ This is a GrantFox OSS / Official Campaign task and may be rewarded. When your PR is merged you'll be prompted to rate the project — a 5-star rating is much appreciated.