FlashEx v1.5

FlashEx updated to v1.5

• Updated esptool 4.8.1 to 5.1.0
• Updated System.IO.Ports
• Updated System.Management
• Updated firmware list
• Improved handling of the custom firmware list
• Added clear button for terminal

Updated esptool commands:

• 'image_info' to 'image-info'
• 'read_flash' to ' read-flash'
• 'write_flash' to ' write-flash'
• 'flash_id' to 'flash-id'
• 'erase_flash' to 'erase-flash'

Full Changelog: FlashEx-v1.4...FlashEx-v1.5