chore: add vscode setting

Author: lencx

.vscode/extensions.json

@@ -0,0 +1,8 @@
+{
+  "recommendations": [
+    "rust-lang.rust-analyzer",
+    "vadimcn.vscode-lldb",
+    "serayuzgur.crates",
+    "tamasfe.even-better-toml"
+  ]
+}

.vscode/launch.json

@@ -0,0 +1,45 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "lldb",
+      "request": "launch",
+      "name": "Debug executable 'rust-fe'",
+      "cargo": {
+        "args": [
+          "build",
+          "--bin=rust-fe",
+          "--package=rust-fe"
+        ],
+        "filter": {
+          "name": "rust-fe",
+          "kind": "bin"
+        }
+      },
+      "args": [],
+      "cwd": "${workspaceFolder}"
+    },
+    {
+      "type": "lldb",
+      "request": "launch",
+      "name": "Debug unit tests in executable 'rust-fe'",
+      "cargo": {
+        "args": [
+          "test",
+          "--no-run",
+          "--bin=rust-fe",
+          "--package=rust-fe"
+        ],
+        "filter": {
+          "name": "rust-fe",
+          "kind": "bin"
+        }
+      },
+      "args": [],
+      "cwd": "${workspaceFolder}"
+    }
+  ]
+}