precondition install the LIB https://github.com/finitespace/BME280

Add #define HAS_BME280 to activate this function

change in the code:
- add declaration for BME280
- add setup in void setup() for BMS280

add #define HAS_BME280 to activate the function

change in code:
add static esp_err_t readSensor_handler(httpd_req_t *req) to get the sensor data "inline"
depending on HAS_BME280, load specific data from index_other.h

add section for sensor data in simple view

add .card layout defition

fix build failer line 658  replace with HTTPD_RESP_USE_STRLEN