doc: add starter for 1.10 release notes
doc: add starter for 1.10 release notes

Note we've added a new Sphinx inline role for references to GitHub
issues, :github:`1234` (along with the existing inline role for Jira
issues :jira:`ZEP-1234`)

Signed-off-by: David B. Kinder <c56c8b29908a5b2af1b63001268d73a0b7f972ba@intel.com>

zephyrproject-rtos/zephyr,explora26/zephyr,punitvara/zephyr,galak/zephyr,explora26/zephyr,zephyriot/zephyr,nashif/zephyr,galak/zephyr,kraj/zephyr,zephyriot/zephyr,aceofall/zephyr-iotos,mbolivar/zephyr,zephyriot/zephyr,mbolivar/zephyr,mbolivar/zephyr,explora26/zephyr,Vudentz/zephyr,kraj/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,zephyriot/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,ldts/zephyr,nashif/zephyr,finikorg/zephyr,Vudentz/zephyr,galak/zephyr,punitvara/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,aceofall/zephyr-iotos,ldts/zephyr,punitvara/zephyr,finikorg/zephyr,Vudentz/zephyr,aceofall/zephyr-iotos,kraj/zephyr,zephyriot/zephyr,nashif/zephyr,aceofall/zephyr-iotos,finikorg/zephyr,galak/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,galak/zephyr,aceofall/zephyr-iotos,nashif/zephyr,mbolivar/zephyr,punitvara/zephyr,ldts/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,mbolivar/zephyr,explora26/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,Vudentz/zephyr,ldts/zephyr,kraj/zephyr,nashif/zephyr