NovaShell替换为默认shell (#456)

* NovaShell替换为默认shell

* delete some envvar

* 自动从dragonos镜像站更新dadk

* 更新github ci环境

* 修复yml格式问题

* 更新novashell到95738b235f

---------

Co-authored-by: longjin <longjin@DragonOS.org>

user/dadk/config/dragon_reach-0.1.0.dadk

@@ -6,7 +6,7 @@
     "BuildFromSource": {
       "Git": {
         "url" : "https://git.mirrors.dragonos.org/DragonOS-Community/DragonReach.git",
-        "revision": "d70ac4ed6b"
+        "revision": "4768985ade"
       }
     }
   },

user/dadk/config/nova_shell-0.1.0.dadk

@@ -0,0 +1,23 @@
+{
+  "name": "NovaShell",
+  "version": "0.1.0",
+  "description": "NovaShell程序",
+  "task_type": {
+    "BuildFromSource": {
+      "Git": {
+        "url": "https://git.mirrors.dragonos.org.cn/DragonOS-Community/NovaShell.git",
+        "revision": "95738b235f"
+      }
+    }
+  },
+  "depends": [],
+  "build": {
+    "build_command": "make install"
+  },
+  "clean": {
+    "clean_command": "make clean"
+  },
+  "install": {
+    "in_dragonos_path": "/"
+  }
+}