Add FanControl.ChromeboxEC plugin, project background, ectool docs

- Add FanControl.ChromeboxEC plugin for Fan Control
- Add project background/缘由 in README (EN/zh)
- Add docs/ectool-commands-zh.md
- Update sln, appsettings, gitignore

Made-with: Cursor

FanControl.ChromeboxEC/FanControl.ChromeboxEC.json.example

@@ -0,0 +1,6 @@
+{
+  "EctoolPath": "C:\\Program Files\\crosec\\ectool.exe",
+  "TempArgs": ["temps", "0"],
+  "FanRpmArgs": ["pwmgetfanrpm", "0"],
+  "AutoFanCtrlArgs": ["autofanctrl"]
+}