chore: ignore generated build artifacts and add shared keil config

.embeddedskills/config.json

@@ -0,0 +1,7 @@
+{
+  "keil": {
+    "project": "MDK-ARM/TCP2UART.uvprojx",
+    "target": "TCP2UART",
+    "log_dir": ".embeddedskills/build"
+  }
+}

.gitignore

@@ -28,11 +28,14 @@ MDK-ARM/DebugConfig/
 MDK-ARM/TCP2UART/
 build_keil.log
 MDK-ARM/build.log
+MDK-ARM/build_capture.txt
 MDK-ARM/build_output.txt
 MDK-ARM/keil-build-viewer.log
 MDK-ARM/keil-build-viewer-record.txt
 MDK-ARM/keil-build-viewer.exe
 MDK-ARM/EventRecorderStub.scvd
+.embeddedskills/build/
+.embeddedskills/state.json
 build_current.log
 uv4_stdout.txt