fix: exclude assets from published packages (#70)

* Initial plan

* Add exclude fields to reduce package size by ~3.1MB

Co-authored-by: Vaiz <4908982+Vaiz@users.noreply.github.com>

* Revert documentation URL change in rust-mcp-transport Cargo.toml

Co-authored-by: Vaiz <4908982+Vaiz@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: Vaiz

crates/rust-mcp-macros/Cargo.toml

@@ -9,6 +9,7 @@ documentation = "https://docs.rs/rust-mcp-macros"
 keywords = ["rust-mcp-stack", "model", "context", "protocol", "macros"]
 license = "MIT"
 edition = "2021"
+exclude = ["assets/"]
 
 [package.metadata.docs]
 description = "A procedural macro, part of the rust-mcp-sdk ecosystem, that derives the MCPToolSchema implementation for structs or enums, generating a tool_input_schema function used with rust_mcp_schema::Tool."

crates/rust-mcp-sdk/Cargo.toml

@@ -9,6 +9,7 @@ documentation = "https://docs.rs/rust-mcp-sdk"
 keywords = ["rust-mcp-stack", "model", "context", "protocol", "sdk"]
 license = "MIT"
 edition = "2021"
+exclude = ["assets/", "tests/"]
 
 [dependencies]
 rust-mcp-schema = { workspace = true, default-features = false }

crates/rust-mcp-transport/Cargo.toml

@@ -9,6 +9,7 @@ documentation = "https://docs.rs/rust-mcp-transport"
 keywords = ["rust-mcp-stack", "model", "context", "protocol", "sdk"]
 license = "MIT"
 edition = "2021"
+exclude = ["assets/"]
 
 [dependencies]