feat(docs): add build system v2 documentation files

Add stump files for the build system v2 documentation with automatic API
generation from CMake files.

Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>

docs/en/api-guides/build-system-v2.rst

@@ -0,0 +1,36 @@
+Build System v2
+***************
+
+
+API Reference
+=============
+
+This section contains an automatically generated API reference from the build
+system v2 CMake source code.
+
+.. _cmakev2_variables:
+
+Variables
+---------
+
+
+.. _cmakev2_functions:
+
+Functions
+---------
+
+
+.. _cmakev2_macros:
+
+Macros
+------
+
+.. cmakev2:include:: ../../../tools/cmakev2/build.cmake
+.. cmakev2:include:: ../../../tools/cmakev2/compat.cmake
+.. cmakev2:include:: ../../../tools/cmakev2/component.cmake
+.. cmakev2:include:: ../../../tools/cmakev2/idf.cmake
+.. cmakev2:include:: ../../../tools/cmakev2/kconfig.cmake
+.. cmakev2:include:: ../../../tools/cmakev2/ldgen.cmake
+.. cmakev2:include:: ../../../tools/cmakev2/manager.cmake
+.. cmakev2:include:: ../../../tools/cmakev2/project.cmake
+.. cmakev2:include:: ../../../tools/cmakev2/utilities.cmake

docs/en/api-guides/index.rst

@@ -13,6 +13,7 @@ API Guides
    :SOC_BLE_MESH_SUPPORTED: esp-ble-mesh/ble-mesh-index
    bootloader
    build-system
+   build-system-v2
    :SOC_SUPPORT_COEXISTENCE: coexist
    c
    cplusplus

docs/zh_CN/api-guides/build-system-v2.rst

@@ -0,0 +1 @@
+.. include:: ../../en/api-guides/build-system-v2.rst

docs/zh_CN/api-guides/index.rst

@@ -13,6 +13,7 @@ API 指南
    :SOC_BLE_MESH_SUPPORTED: esp-ble-mesh/ble-mesh-index
    bootloader
    build-system
+   build-system-v2
    :SOC_SUPPORT_COEXISTENCE: coexist
    c
    cplusplus