1. Fix WiFi scan leads to poor performance of Bluetooth.
2. Improve WiFi connect success ratio when coexist with Bluetooth.
3. Check if WiFi is still connected when CSA or beacon timeout happen.
4. add coex pre init
Fix following WiFi bugs:
1. Fix the bug for API_CHECK_ENABLED
2. Fix the bug that wpa2 enterprise sta can connect open AP
3. Fix TKIP/CCMP PN replay attack detection bug
4. Increase buffer number type from uint8_t to uint16_t to support more than 255 buffers
5. Avoid recalculating PMK if esp_wifi_set_config() is not called
6. Fix 5.5M signal test bug
1. Fix high beacon and broadcast packets loss ratio of WiFi to
make MDNS test pass.
2. Improve stability of WiFi performance with a little sacrifice
of throughput.
3. Improve BLE advertising and connection performance with
dynamic priority. It sacrifices a little WiFi throughput, but
achieves balance between WiFi and Bluetooth.
1. resend eb which are pending in g_ic.tx_buf due to channel switch.
2. add lock for mgmg/xon/bcast to protect send from user flush.
3. softap: add check if secondary offset is correct when start softap.
4. softap: in inactive timer handler, add check if child bss is removed to avoid removing it again.
5. disable A-MPDU for non-root.
6. fix reusing a freed eb.
7. fix when node becomes root, it does not record assoc value to nvs.
8. discard unnecessary forwarded group packets.
9. fix toDS state is not updated in time.
10. fix s_sta_cnx_times is not cleared when deinit causes root sends ADD annoucement.
11. root: increase beacon timeout time from 6 seconds to 15 seconds to delay initiation of reconnection.
12. add esp_mesh_get_tsf_time to return TSF time.
13. send the whole routing table multi-times.
14. clear candidate settings if not receive candidate beacon within 8 seconds.
Move supplicant to idf and do following refactoring:
1. Make the folder structure consitent with supplicant upstream
2. Remove duplicated header files and minimize the public header files
3. Refactor for WiFi/supplicant interfaces
