Added Okta MCP server

[kapilduraphe]

Description

This PR introduces a new MCP server for Okta. It supports fetching the user related info. More actions to come in the near future.

Server Details

• Server: Okta

Motivation and Context

This change is needed to provide seamless integration with Okta API using the MCP framework. It enables developers to interact with the Okta APIs. It current supports fetching the Okta user related info. More actions to come in the near future.

This PR solves the problem of manually handling Okta API operations by abstracting them into structured tools that MCP clients can call.

How Has This Been Tested?

• Tested using an MCP-compatible client
• Verified that all tools return expected responses from Okta API.
• Ensured proper handling of invalid input and Okta API failures.
  Tested common scenarios including:
• Fetching an Okta user profile via Claude Desktop app

Breaking Changes

• No breaking changes expected, but users must configure their MCP client to use okta-mcp.
• Requires a valid OKTA API KEY in the environment

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context