build: upgrade all workspace crates to rust edition 2024

linux-nvim/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "mcp-memory-linux-nvim"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [dependencies]
 serde_json = "1.0"

nvim-core/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "nvim-core"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [dependencies]
 serde = { version = "1.0", features = ["derive"] }

win-nvim/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "mcp-memory-win-nvim"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [dependencies]
 serde_json = "1.0"