Refactor /provider to /providers

[charlesLoder]

Closes #30

[Copilot]

Pull Request Overview

This PR refactors the provider export path from /provider to /providers to follow common naming conventions for modules containing multiple provider types.

• Renamed the provider module path from /provider to /providers
• Updated all import statements across documentation and development files
• Modified package.json exports configuration to reflect the new path

Reviewed Changes

Copilot reviewed 6 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
stories/docs/welcome.mdx	Updated import path in documentation example
stories/docs/example.mdx	Updated import path in story documentation
src/providers/userTokenProvider/index.tsx	Fixed relative import path to BaseProvider
src/providers/index.ts	Added new providers module export file
package.json	Updated exports configuration for new providers path
dev/index.tsx	Updated import path in development environment

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