Add code-spell spelling checks to CI (#8067)

Help find and fix silly spelling errors as they are added to the repo.

libraries/esp8266/examples/CheckFlashCRC/CheckFlashCRC.ino

@@ -8,7 +8,7 @@
 extern "C" {
 #include "spi_flash.h"
 }
-// Artificially create a space in PROGMEM that fills multipe sectors so
+// Artificially create a space in PROGMEM that fills multiple sectors so
 // we can corrupt one without crashing the system
 const int corruptme[SPI_FLASH_SEC_SIZE * 4] PROGMEM = { 0 };
 

libraries/esp8266/examples/HwdtStackDump/HwdtStackDump.ino

@@ -43,7 +43,7 @@ void setup(void) {
   // more of the SYS stack.
   WiFi.mode(WIFI_STA);
   WiFi.begin(ssid, password);
-  Serial.println(F("A WiFi connection attmpt has been started."));
+  Serial.println(F("A WiFi connection attempt has been started."));
   Serial.println();
 
   // #define DEMO_NOEXTRA4K

libraries/esp8266/examples/HwdtStackDump/ProcessKey.ino

@@ -70,7 +70,7 @@ void processKey(Print& out, int hotKey) {
       out.println(F("This line will not be printable w/o running GDB"));
       break;
     case '0':
-      out.println(F("Crashing at an embeded 'break 1, 15' instruction that was generated"));
+      out.println(F("Crashing at an embedded 'break 1, 15' instruction that was generated"));
       out.println(F("by the compiler after detecting a divide by zero."));
       out.printf_P(PSTR("This should not print %d\n"), divideA_B_bp(1, 0));
       break;

libraries/esp8266/examples/IramReserve/ProcessKey.ino

@@ -70,7 +70,7 @@ void processKey(Print& out, int hotKey) {
       out.println(F("This line will not be printable w/o running GDB"));
       break;
     case '0':
-      out.println(F("Crashing at an embeded 'break 1, 15' instruction that was generated"));
+      out.println(F("Crashing at an embedded 'break 1, 15' instruction that was generated"));
       out.println(F("by the compiler after detecting a divide by zero."));
       out.printf_P(PSTR("This should not print %d\n"), divideA_B_bp(1, 0));
       break;

libraries/esp8266/examples/NTP-TZ-DST/NTP-TZ-DST.ino

@@ -241,7 +241,7 @@ void setup() {
 
   // install callback - called when settimeofday is called (by SNTP or user)
   // once enabled (by DHCP), SNTP is updated every hour by default
-  // ** optional boolean in callback function is true when triggerred by SNTP **
+  // ** optional boolean in callback function is true when triggered by SNTP **
   settimeofday_cb(time_is_set);
 
   // setup RTC time
@@ -251,7 +251,7 @@ void setup() {
   timeval tv = { rtc, 0 };
   settimeofday(&tv, nullptr);
 
-  // NTP servers may be overriden by your DHCP server for a more local one
+  // NTP servers may be overridden by your DHCP server for a more local one
   // (see below)
 
   // ----> Here is the ONLY ONE LINE needed in your sketch

libraries/esp8266/examples/StreamString/StreamString.ino

@@ -38,7 +38,7 @@ void testStreamString() {
 
   // By default, reading a S2Stream(String) or a StreamString will consume the String.
   // It can be disabled by calling ::resetPointer(), (not default)
-  // and reenabled by calling ::setConsume(). (default)
+  // and re-enabled by calling ::setConsume(). (default)
   //
   // In default consume mode, reading a byte or a block will remove it from
   // the String.  Operations are O(n²).
@@ -110,7 +110,7 @@ void testStreamString() {
     result.clear();
     S2Stream input(inputString);
     // reading stream will consume the string
-    input.setConsume(); // can be ommitted, this is the default
+    input.setConsume(); // can be omitted, this is the default
 
     input.sendSize(result, 1);
     input.sendSize(result, 2);