Add launch.json for VSCode & Emacs dap-mode

Untested with VSCode. Launches OK for dap-mode.

launch.json

@@ -0,0 +1,18 @@
+{
+    "configurations": [
+        {
+            "type": "cppdbg",
+            "request": "launch",
+            "name": "Daemon Debug",
+            "MIMode": "gdb",
+            "miDebuggerPath": "rust-gdb",
+            "environment": [],
+	    "args": ["development.db", "--textdump", "JHCore-DEV-2.db", "--textdump-out", "out.db"],
+            "program": "${workspaceFolder}/target/debug/moor-daemon",
+            "cwd": "${workspaceFolder}",
+            "console": "external",
+            "dap-compilation": "cargo build",
+            "dap-compilation-dir": "${workspaceFolder}",
+        }
+    ]
+}