Updated dependencies and a new BLE implementation

• External dependencies have been updated and tested:
  • Arduino-ESP32 support package (core): version 3.3.4
  • NimBLE-Arduino: version 2.3.7 is supported but not needed anymore (see below).
  • Arduino IDE version 2.3.7.
• BLE HID has been implemented directly on the NimBLE stack without any wrapper.
  It is available in the file hid_BLE.cpp and is the new default.
  However, "pure" ESP32 boards still use the Bluedroid stack instead of NimBLE.
  This is how ESP32-Arduino core 3.3.4 works.
  NimBLE will be available for that board when core version 4.0.0 is released.
• The file hid_NimBLE.cpp has been renamed to hid_h2zero.cpp to make clear that this implementation is based on h2zero's NimBLE wrapper.
• The file hid_ESPBLE.cpp has been removed.
• Those changes are explained in this discussion.
• You must run the sources setup procedure again. For backwards compatibility, it will automatically rename some old file names found in "includes.txt".
• Documentation has been updated accordingly.
• Small bug fix: bite point not automatically updated when commanded from the companion app.

Full Changelog: 7.7.8...7.7.9

Bug fix

• Fix bug at HidServiceProvider regarding the custom VID/PID.
• Unused code removed.

Full Changelog: 7.7.7...7.7.8

Another enhancement to the battery calibration procedure

• During the calibration procedure, the reported battery level will change by 1% once per minute.
  This way, you have evidence that the procedure is running.
• Bug fix for battery monitors using the batt_en pin.

Full Changelog: 7.7.6...7.7.7

Bug fix in the battery calibration sketch

• Bug fix affecting the battery calibration sketch.
• Errata fixes.

Full Changelog: 7.7.5...7.7.6

Simplified battery calibration procedure

• The battery calibration procedure has been simplified.
  The annoying 3 minutes countdown has been removed and explicit user action is required to delete the previously stored battery calibration data. Now the procedure will start as soon as there is a BLE connection.
  This way, there is no chance to overwrite the calibration data by accident.
• Documentation updates.

Full Changelog: 7.7.4...7.7.5

Bug fixes

• Documentation updates.
• Now the CD/CI chain computes code coverage for automated tests (only).
• Fixed a bug in the LED strips caused by "pure" ESP32 boards not having DMA support.
  This was a blocking issue.
• Fixed a bug in the ADC readings caused by the ADC2 unit being shared
  with the Bluetooth radio (only on "pure" ESP32 boards).
  This was a blocking issue.
  This patch should improve the ADC performance a bit, too.
• Increased stack size for the input polling daemon.
  This was a blocking issue depending on the particular custom firmware.
• Unused code has been removed.
• A potential bug has been fixed regarding UI notifications.
  The task watchdog timer is reset between calls to event handlers.
• Fixed a bug causing the system to crash and reboot just on the first pairing (BLE) when having pixel control notifications.
• Upgrading is highly recommended.

Full Changelog: 7.7.3...7.7.4

Custom DevKit PCB design

• A custom DevKit PCB design has been added to the project, including customizable firmware and documentation.
• Performance tweaks for LED strips, including DMA mode and less memory consumption.
• Minor documentation updates.
• The NimBLE-Arduino dependency has been updated to version 2.3.5

Full Changelog: 7.7.2...7.7.3

Improve the battery monitor subsystem

• The battery monitor subsystem has been reimplemented.
  This was done for extensibility, testability and testing.
• The firmware now detects whether the battery is charging so as not to report an inconsistent state of charge.
  Works with non-constant voltage battery chargers.
• It also detects whether the system is operating with wired power.
• Therefore, four parameters of the battery status are collected:
  charging status, battery presence, cable presence, and charge level.
  In the future, it may be possible for this information to be reported to the host computer.
• No changes are required in your custom firmware, but you must run the sources setup procedure again.
• If available, firmware-defined error messages are reported in both the UART and USB serial interfaces.
• A new custom firmware sketch has been created for the upcoming custom PCB DevKit, which is still under development.
• Minor documentation updates.

Enhance I2C bus initialization and clarify bus capacitance

• Added the missing implementation of inputs::initializeI2C().
  Surprisingly, no sketch is using it so it went unnoticed.
• Now the internal pull-up resistors in the I2C bus can be disabled thanks to another inputs::initializeI2C() parameter.
• Additional advice and explanations are given regarding pull-up resistors in the I2C bus.

Full Changelog: 7.6.0...7.7.0

Fix inconsistent handling of pixel control notifications

• Fixed inconsistent handling of pixel control notifications on startup and before connection.
• Battery presence is now available to the system in the BatteryService class.
• The OnSettingsSaved event is no longer triggered on the battery autocalibration setting,
  as that is not explicitly changed by the user.