NEWS: updates for v1.0
NEWS: updates for v1.0

Add release notes for v1.0.

Also: the master branch doesn't contain the tags for bugfix releases so
documenting them in this branche's NEWS makes no sense.

Fold all the info about bugfix releases into the next minor release and
only keep major and minor releases in NEWS on the master branch. Bugfix
releases will only be documented in their respective minor branches
from now on.

Signed-off-by: Bartosz Golaszewski <108de5fbc428215dc26df4468b48691526611148@gmail.com>

brgl/libgpiod,brgl/libgpiod,brgl/libgpiod,brgl/libgpiod