feat: build default assets instead of downloading and v2 tables for esp-hi, echoear (#1203)

* fix: call flush ready on io ready

* eachear: update to v2 partition table but disable class Assets currently

* stop gif if previewing an image

* feat: build default assets instead of downloading

* version updates

* fix None error

* delay 1s before enter wifi config mode

* fix compiling with v1 partition table

---------

Co-authored-by: Xiaoxia <terrence.huang@tenclass.com>

main/boards/echoear/README.md

@@ -27,10 +27,6 @@ idf.py menuconfig
 ### 基本配置
 - `Xiaozhi Assistant` → `Board Type` → 选择 `EchoEar`
 
-### 分区表配置
-- `Partition Table` → `Partition Table` → 选择 `Custom partition table CSV`
-- `Partition Table` → `Custom partition CSV file` → 输入 `partitions/v1/16m_echoear.csv`
-
 ### UI风格选择
 
 EchoEar 支持两种不同的UI显示风格，通过修改代码中的宏定义来选择：