Add a VS Code workspace.

Helps rust-analyser find the firmware projects, which aren't in the Cargo workspace (because of issues with feature flags, and them being different targets).

Author: jonathanpallant

.vscode/neotron-bmc.code-workspace

@@ -0,0 +1,14 @@
+{
+	"folders": [
+		{
+			"path": ".."
+		}
+	],
+	"settings": {
+		"rust-analyzer.linkedProjects": [
+			"./neotron-bmc-pico/Cargo.toml",
+			"./neotron-bmc-nucleo/Cargo.toml",
+			"./Cargo.toml"
+		]
+	 }
+}