Kconfig: Add ALLOW_PROPRIETARY_COMPONENTS option

Add a new license configuration option for components that have
proprietary, custom, or non-standard open source licenses.

This option allows projects to explicitly opt-in to using components
with non-standard license terms, such as:
- Custom permissive licenses requiring attribution
- Proprietary licenses with specific usage restrictions
- Other non-standard license terms

Also update the License Setup documentation section to include
this new option.

Signed-off-by: makejian <makejian@xiaomi.com>

Author: ThePassionate

Documentation/quickstart/configuring.rst

@@ -151,3 +151,22 @@ Multiple config fragments can be merged manually using the tools/merge_config.py
 
    $ cd nuttx
    $ ./tools/merge_config.py -o defconfig .config1 .config2
+
+License Setup
+=============
+
+NuttX includes components with various open source licenses. To use these components,
+you must explicitly enable the corresponding license configuration option in the
+:menuselection:`License Setup` menu:
+
+* ``CONFIG_ALLOW_BSD_COMPONENTS`` - BSD licensed components (NFS, SPIFFS, Bluetooth LE, etc.)
+* ``CONFIG_ALLOW_GPL_COMPONENTS`` - GPL/LGPL licensed components
+* ``CONFIG_ALLOW_MIT_COMPONENTS`` - MIT licensed components
+* ``CONFIG_ALLOW_BSDNORDIC_COMPONENTS`` - 5-Clause Nordic licensed components (NRF chips only)
+* ``CONFIG_ALLOW_ECLIPSE_COMPONENTS`` - Eclipse Public License components
+* ``CONFIG_ALLOW_ICS_COMPONENTS`` - ICS licensed components
+* ``CONFIG_ALLOW_PROPRIETARY_COMPONENTS`` - Proprietary or custom licensed components
+
+.. warning::
+   Please carefully review the license terms for each enabled component to ensure
+   compliance with your project's licensing requirements.

Kconfig

@@ -97,6 +97,23 @@ config ALLOW_ICS_COMPONENTS
 		NOTE: Please check that the license for each enabled
 		component matches your project license.
 
+config ALLOW_PROPRIETARY_COMPONENTS
+	bool "Use components that have proprietary or custom licenses"
+	default n
+	---help---
+		When this option is enabled the project will allow the use
+		of components that have proprietary, custom, or non-standard
+		open source licenses.
+
+		This includes components with:
+		- Custom permissive licenses (e.g., requiring attribution)
+		- Proprietary licenses with specific usage restrictions
+		- Other non-standard license terms
+
+		NOTE: Please carefully review the license terms for each
+		enabled component to ensure compliance with your project
+		requirements.
+
 endmenu # License Setup
 
 menu "Build Setup"