sim: Add Berry interpreter configuration

[speccy88]

Summary

• Add Berry interpreter documentation under Documentation/applications/interpreters/berry.
• Add a sim:berry configuration that enables the Berry interpreter and its required dependencies.

Context

This is the NuttX-side companion for the optional Berry interpreter app proposed in apache/nuttx-apps#3564.

Testing

Built sim:berry against apache/nuttx-apps#3564 locally on macOS arm64:

./tools/configure.sh -a ../nuttx_apps_berry_pr sim:berry
make olddefconfig
make -j8

Runtime smoke test:

NuttShell (NSH)
nsh> berry -v
Berry 1.1.0
nsh> berry -e print(40+2)
42
nsh> berry
Berry 1.1.0 (build in Jun 26 2026, 09:34:41)
[clang 21.0.0 (clang-2100.1.1.101)] on NuttX (default)
> import os
> os.exit(0)
nsh>

[github-actions]

MemBrowse Memory Report

No memory changes detected for:

• arduino-mega2560
• esp32-devkitc
• hifive1-revb
• mirtoo
• qemu-armv8a
• qemu-intel64
• rx65n-rsk2mb
• s698pm-dkit
• stm32-nucleo-f103rb