WebDAV MCP Server

<!-- Provide a brief description of your changes --> ## Description ## Server Details <!-- If modifying an existing server, provide details --> - Server: <!-- e.g., filesystem, github --> - Changes to: <!-- e.g., tools, resources, prompts --> ## Motivation and Context <!-- Why is this change needed? What problem does it solve? --> ## How Has This Been Tested? <!-- Have you tested this with an LLM client? Which scenarios were tested? --> ## Breaking Changes <!-- Will users need to update their MCP client configurations? --> ## Types of changes <!-- What types of changes does your code introduce? Put an `x` in all the boxes that apply: --> - [x] Bug fix (non-breaking change which fixes an issue) - [x] New feature (non-breaking change which adds functionality) - [x] Breaking change (fix or feature that would cause existing functionality to change) - [x] Documentation update ## Checklist <!-- Go over all the following points, and put an `x` in all the boxes that apply. --> - [x] I have read the [MCP Protocol Documentation](https://modelcontextprotocol.io) - [x] My changes follows MCP security best practices - [x] I have updated the server's README accordingly - [x] I have tested this with an LLM client - [x] My code follows the repository's style guidelines - [x] New and existing tests pass locally - [x] I have added appropriate error handling - [x] I have documented all environment variables and configuration options ## Additional context <!-- Add any other context, implementation notes, or design decisions -->