Enhancement of status page

[HuffYk]

I did a fork with small changes (mainly to status page):

• added check for ESP8266 or ESP32 and show it with pragma message (ends with pragma error otherwise)
• refactored status_string fnc to use String class
• added new info to status page:
  • ESP32 chip model and rev
  • ESP32 chip cores
  • ESP32 chip temperature
  • CPU chip speed
  • Flash chip speed
  • Flash size
  • SDK version
  • Wifi SID
  • Wifi IP address

if interested these are two relevant commits (forgot to put it into one PR):

• HuffYk@bde5239
• HuffYk@30cc5c2

example:

Firmware version: bde5239-dirty
ESP32 chip model: ESP32-C3 Rev 4
ESP32 chip cores: 1
ESP32 chip temperature: 57.20 °C
CPU chip speed: 160 MHz
Flash chip speed: 80 MHz
Flash size: 4 MB
Free heap: 161624 B
SDK version: v4.4.6-dirty
Wifi SID: MyWifiSID
Wifi IP address: 192.168.2.50
Wifi rssi: -58 dBm

async mode: true
software serial mode: true
uptime: 1005 s
last_connect_time: 345 ms
reconnect_count: 1 
reset_code: 3
loop_duration: 22 µs
max_loop_duration: 33739 µs
nbr arbitrations: 170
nbr restarts1: 0
nbr restarts2: 0
nbr lost1: 4
nbr lost2: 0
nbr won1: 166
nbr won2: 0
nbr late: 0
nbr errors: 0
pwm_value: 130

[danielkucera]

Hello,
could you please create a PR?
Although this is broken now already, I'd like to have a uniform format for all the status variables:

lowercase_name_of_variable_with_underscores: value unit

Could you also please change that?

[HuffYk]

sure, here it is: #71