Move bridging models generation function from hakedataUSA repo here

[cgrandin]

Move it from here: https://github.com/pacific-hake/hakedataUSA/blob/main/R/write_bridging.R

Change pathing to match hake-assessment formats, check dependencies on other code in the hakedataUSA repo.

Currently on the server the method to make these directories was:

write_bridging(dir_input = "/srv/hake/models/2022/01-version/01-base-models/01-base",
               dir_output = "/srv/hake/models/2023-01-version/02-bridging-models")

then manually copy and paste 06- to 01-base, then run
sens_base("/srv/hake/models/2023/01-version")

Need to add permissions changing code:
chmod -R u=rwx,g=rwx,o=rwx 01-version