zephyr: docs: Update the doc template
zephyr: docs: Update the doc template

Update the document template to reflect current best practices.
Specifically, move all related Kconfigs into a separate file and link to
the file only

BUG=b:207403708
BRANCH=none
TEST=View preview in gitiles

Signed-off-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>
Change-Id: I19e9b78124843e0c9828369464dc37889aeb5114
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3583046
Reviewed-by: Wai-Hong Tam <04b587fdf5845741a0c5a8b9cd59ca72d73ef8fc@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec