Unignore .vscode folder.

Unignore .vscode folder and add necessary configuration files for a
synced development environment.

.vscode/settings.json

@@ -1,23 +1,3 @@
 {
-    "files.associations": {
-        "relay_chn.h": "c",
-        "stdlib.h": "c",
-        "cstdint": "c",
-        "relay_chn_run_info.h": "c",
-        "esp_err.h": "c",
-        "relay_chn_output.h": "c",
-        "relay_chn_core.h": "c",
-        "relay_chn_ctl.h": "c",
-        "relay_chn_tilt.h": "c",
-        "relay_chn_defs.h": "c",
-        "esp_check.h": "c",
-        "esp_event_base.h": "c",
-        "esp_event.h": "c",
-        "queue.h": "c",
-        "relay_chn_priv_types.h": "c",
-        "relay_chn_adapter.h": "c",
-        "relay_chn_types.h": "c"
-    },
-    "idf.port": "/dev/ttyUSB0",
-    "idf.pythonInstallPath": "/usr/bin/python"
+    "C_Cpp.intelliSenseEngine": "default"
 }