fix: redirect ServeCommand output to STDERR for stdio transport

Console output methods sometimes write to STDOUT, which interferes with JSON-RPC communication in stdio mode. This redirects startup messages to STDERR when available.

docs: Update README with latest features and capabilities.

fix: remove output message after STDIO transport stops

When MCP clients disconnect from STDIO transport, they close STDOUT/STDERR
streams before the Laravel command completes. Attempting to output
"MCP Server (STDIO) stopped." to closed streams causes fwrite() errors.

docs: transport should be explicitly set to stdio for the tool to start

When starting the tool is VSCode without providing a transport, it can't "Choose transport protocol for MCP server communication", so we need to explicitly define it.

docs: Expand README.md with detailed explanations of MCP registration…

… methods and their configurations

[skip ci]

feat: `McpServiceProvider` file and `loadElements` function not found

refactor: Adapt to php-mcp/server v1.1.0 changes

chore: update README.md