Add Glama maintainer metadata

[onatozmenn]

What this changes

Adds glama.json so Glama can verify the GitHub maintainer for the organization-owned Deed MCP server listing.

Why this way

Glama requires an organization repository to name the claiming GitHub user in this root metadata file. The file points to Glama's published JSON schema and names the maintainer account used for the claim.

What it still does not do

This does not add runtime or Docker configuration to the repository. Glama stores and tests that configuration on the server listing after ownership is verified.

Checks

• Parsed glama.json as JSON and asserted its exact keys and values
• Fetched the declared schema with HTTP 200 and parsed it as JSON
• git diff --check -- glama.json
• cargo fmt --check (not run; no Rust files changed)
• cargo clippy --workspace --all-targets -- -D warnings (not run; no Rust files changed)
• cargo test --workspace (not run; no runtime code changed)
• Compiler corpus checks (not applicable)
• Design document update (not applicable)
• Tests added (not applicable; declarative ownership metadata)