[BUG] nsh free is not present even if not disabled in the config.

### Description / Steps to reproduce the issue

1. Check the `.config` to contain `# CONFIG_NSH_DISABLE_FREE is not set`.
2. Build and flash the firmware.
3. See that `free` command is not present.
```
nsh> ?
help usage: help [-v] []

? exec exit help hexdump xd
```

### On which OS does this issue occur?

[OS: BSD]

### What is the version of your OS?

FreeBSD 13.3-RELEASE-p7 GENERIC amd64

### NuttX Version

12.7.0-RC0

### Issue Architecture

[Arch: arm]

### Issue Area

[Area: Applications], [Area: Configuring], [Area: Memory Management]

### Verification

- [X] I have verified before submitting the report.

Start with the .config setting CONFIG_NSH_DISABLE_FREE and the nsh help output shown in the report. Trace how the free command is included in the Applications, Configuring, and Memory Management areas, then rebuild and flash the firmware to confirm that free appears in the nsh command list when the setting is not disabled.

Written by the indexing model from the issue text.