doc: releases: add working draft release notes + guide for v4.0.0

Add working drafts for the release notes and migration guide for v4.0.0

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>

doc/releases/index.rst

@@ -86,6 +86,7 @@ needs to be changed are to be detailed in the release's migration guide.
    eol_releases
    release-notes-2.7
    release-notes-3.[5-7]
+   release-notes-4.0
 
 Migration Guides
 ****************

doc/releases/migration-guide-4.0.rst

@@ -0,0 +1,112 @@
+:orphan:
+
+.. _migration_4.0:
+
+Migration guide to Zephyr v4.0.0 (Working Draft)
+################################################
+
+This document describes the changes required when migrating your application from Zephyr v3.7.0 to
+Zephyr v4.0.0.
+
+Any other changes (not directly related to migrating applications) can be found in
+the :ref:`release notes<zephyr_4.0>`.
+
+.. contents::
+    :local:
+    :depth: 2
+
+Build System
+************
+
+Kernel
+******
+
+Boards
+******
+
+Modules
+*******
+
+Mbed TLS
+========
+
+Trusted Firmware-M
+==================
+
+LVGL
+====
+
+Device Drivers and Devicetree
+*****************************
+
+Controller Area Network (CAN)
+=============================
+
+Display
+=======
+
+Enhanced Serial Peripheral Interface (eSPI)
+===========================================
+
+GNSS
+====
+
+Input
+=====
+
+Interrupt Controller
+====================
+
+LED Strip
+=========
+
+Sensors
+=======
+
+Serial
+======
+
+Regulator
+=========
+
+Bluetooth
+*********
+
+Bluetooth HCI
+=============
+
+Bluetooth Mesh
+==============
+
+Bluetooth Audio
+===============
+
+Bluetooth Classic
+=================
+
+Bluetooth Host
+==============
+
+Bluetooth Crypto
+================
+
+Networking
+**********
+
+Other Subsystems
+****************
+
+Flash map
+=========
+
+hawkBit
+=======
+
+MCUmgr
+======
+
+Modem
+=====
+
+Architectures
+*************

doc/releases/release-notes-4.0.rst

@@ -0,0 +1,288 @@
+:orphan:
+
+.. _zephyr_4.0:
+
+Zephyr 4.0.0 (Working Draft)
+############################
+
+We are pleased to announce the release of Zephyr version 4.0.0.
+
+Major enhancements with this release include:
+
+An overview of the changes required or recommended when migrating your application from Zephyr
+v3.7.0 to Zephyr v4.0.0 can be found in the separate :ref:`migration guide<migration_4.0>`.
+
+The following sections provide detailed lists of changes by component.
+
+Security Vulnerability Related
+******************************
+The following CVEs are addressed by this release:
+
+More detailed information can be found in:
+https://docs.zephyrproject.org/latest/security/vulnerabilities.html
+
+API Changes
+***********
+
+Removed APIs in this release
+============================
+
+Deprecated in this release
+==========================
+
+Architectures
+*************
+
+* ARC
+
+* ARM
+
+* ARM64
+
+* RISC-V
+
+* Xtensa
+
+Kernel
+******
+
+Bluetooth
+*********
+
+* Audio
+
+* Host
+
+* HCI Drivers
+
+Boards & SoC Support
+********************
+
+* Added support for these SoC series:
+
+* Made these changes in other SoC series:
+
+* Added support for these boards:
+
+* Made these board changes:
+
+* Added support for the following shields:
+
+Build system and Infrastructure
+*******************************
+
+Drivers and Sensors
+*******************
+
+* ADC
+
+* Battery
+
+* CAN
+
+* Charger
+
+* Clock control
+
+* Counter
+
+* DAC
+
+* Disk
+
+* Display
+
+* Ethernet
+
+* Flash
+
+* GNSS
+
+* GPIO
+
+* Hardware info
+
+* I2C
+
+* I2S
+
+* I3C
+
+* Input
+
+* LED
+
+* LED Strip
+
+* LoRa
+
+* Mailbox
+
+* MDIO
+
+* MFD
+
+* Modem
+
+* MIPI-DBI
+
+* MSPI
+
+* Pin control
+
+* PWM
+
+* Regulators
+
+* Reset
+
+* RTC
+
+* RTIO
+
+* SDHC
+
+* Sensors
+
+* Serial
+
+* SPI
+
+* USB
+
+* Video
+
+* Watchdog
+
+* Wi-Fi
+
+Networking
+**********
+
+* ARP:
+
+* CoAP:
+
+* Connection manager:
+
+* DHCPv4:
+
+* DHCPv6:
+
+* DNS/mDNS/LLMNR:
+
+* gPTP/PTP:
+
+* HTTP:
+
+* IPSP:
+
+* IPv4:
+
+* IPv6:
+
+* LwM2M:
+
+* Misc:
+
+* MQTT:
+
+* Network Interface:
+
+* OpenThread
+
+* PPP
+
+* Shell:
+
+* Sockets:
+
+* Syslog:
+
+* TCP:
+
+* Websocket:
+
+* Wi-Fi:
+
+* zperf:
+
+USB
+***
+
+Devicetree
+**********
+
+Kconfig
+*******
+
+Libraries / Subsystems
+**********************
+
+* Debug
+
+* Demand Paging
+
+* Formatted output
+
+* Management
+
+* Logging
+
+* Modem modules
+
+* Power management
+
+* Crypto
+
+* CMSIS-NN
+
+* FPGA
+
+* Random
+
+* SD
+
+* State Machine Framework
+
+* Storage
+
+* Task Watchdog
+
+* POSIX API
+
+* LoRa/LoRaWAN
+
+* ZBus
+
+HALs
+****
+
+* Nordic
+
+* STM32
+
+* ADI
+
+* Espressif
+
+MCUboot
+*******
+
+OSDP
+****
+
+Trusted Firmware-M
+******************
+
+LVGL
+****
+
+Tests and Samples
+*****************
+
+Issue Related Items
+*******************
+
+Known Issues
+============