Remove non-spec fields from resource content responses

[pushpak1300]

The Text and Blob content classes were including name and title fields in their toResource() output, which are not part of the MCP specification for resource contents.

Changes

• Removed name and title from Text::toResource() in src/Server/Content/Text.php
• Removed name and title from Blob::toResource() in src/Server/Content/Blob.php
• Updated all affected test expectations to match the corrected schema

According to the https://modelcontextprotocol.io/specification/2025-06-18/schema#textresourcecontents:

TextResourceContents should only include:

• uri (required)
• mimeType (optional)
• text (required)
• _meta (optional)

BlobResourceContents should only include:

• uri (required)
• mimeType (optional)
• blob (required)
• _meta (optional)

The name and title fields belong to the resource descriptor itself, not the content payload.