miniprogram: add iap mp for ble OTA

tools/Mini_Program/iap/miniprogram/app.wxss

@@ -0,0 +1,51 @@
+/**app.wxss**/
+/* .container {
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: space-between;
+  padding: 100rpx 0;
+  box-sizing: border-box;
+}  */
+
+
+.flex-row {
+  display: flex;
+  flex-flow: row nowrap;
+}
+
+.flex-row-wrap {
+  display: flex;
+  flex-flow: row wrap;
+}
+
+.flex-column-reverse {
+  display: flex;
+  flex-flow: column-reverse nowrap;
+}
+
+.center {
+  justify-content: center;
+  align-items: center;
+}
+
+.left {
+  justify-content: flex-start;
+  align-items: center;
+}
+
+.right {
+  justify-content: flex-end;
+  align-items: center;
+}
+
+.space-between {
+  justify-content: space-between;
+  align-items: center;
+}
+
+.space-around {
+  justify-content: space-around;
+  align-items: center;
+}