Missing board options when installed in sketchbook folder

[MB3hel]

Describe the problem

When installing a custom core in the sketchbook, board option menus are not shown. They are shown properly with arduino-cli.

To reproduce

1. Extract the contents of msp430.zip to SKETCHBOOK/hardware/arduino-core-msp430/msp430
2. Open the IDE and select the MSP-EXP430FR2433LP board.
3. The Uploader options menu is not shown
4. Run arduino-cli board details -b arduino-core-msp430:msp430:MSP-EXP430FR2433LP. The uploader options are listed.

Expected behavior

The "Uploader" options menu should be shown in the Tools menu.

Arduino IDE version

2.0.3

Operating system

Linux

Operating system version

Ubuntu 22.04 (amd64)

Additional context

Possibly related to #126 or #565

However, the scenario with attiny core described in #565 works as expected (I did test that on the same system)

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the latest nightly build
• My report contains all necessary details

[MB3hel]

Additional information: the problem is solved by changing the folder path to SKETCHBOOK/hardware/msp430core/msp430. It seems that it doesn't handle something about that path (arduino-core-msp430) correctly (hyphens, length, etc).

I'm leaving this open since this does not impact the CLI.