add Anne Pro 2 bootloader & flashing

[bwisn]

Description

Added Anne Pro 2 bootlader and flashing.

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

Issues Fixed or Closed by This PR

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[zvecr]

This code wont actually function correctly and will produce

Invalid API data: blah: bootloader: 'annepro2' is not one of ['atmel-dfu', 'bootloadhid', 'bootloadHID', 'custom', 'caterina', 'halfkay', 'kiibohd', 'lufa-dfu', 'lufa-ms', 'md-boot', 'qmk-dfu', 'qmk-hid', 'stm32-dfu', 'stm32duino', 'gd32v-dfu', 'wb32-dfu', 'unknown', 'usbasploader', 'USBasp', 'tinyuf2']

However there are higher level issues:

• platforms containing keyboard specific code is conceptually wrong
  • linking and invocation of keyboard level code in bootloader_jump
  • board file checks in flash.mk

Given this will have limited exposure, it should be implemented as
BOOTLOADER = custom and PROGRAM_CMD = annepro2_tools $(BUILD_DIR)/$(TARGET).bin at the keyboard level.

annepro2.c would contain the bootloader_jump implementation.

[bwisn]

This code wont actually function correctly and will produce

Invalid API data: blah: bootloader: 'annepro2' is not one of ['atmel-dfu', 'bootloadhid', 'bootloadHID', 'custom', 'caterina', 'halfkay', 'kiibohd', 'lufa-dfu', 'lufa-ms', 'md-boot', 'qmk-dfu', 'qmk-hid', 'stm32-dfu', 'stm32duino', 'gd32v-dfu', 'wb32-dfu', 'unknown', 'usbasploader', 'USBasp', 'tinyuf2']

However there are higher level issues:

• platforms containing keyboard specific code is conceptually wrong

  • linking and invocation of keyboard level code in bootloader_jump
  • board file checks in flash.mk

Given this will have limited exposure, it should be implemented as BOOTLOADER = custom and PROGRAM_CMD = annepro2_tools $(BUILD_DIR)/$(TARGET).bin at the keyboard level.

annepro2.c would contain the bootloader_jump implementation.

Fixed this in #14385, can I close this PR?

[zvecr]

No longer required