ai: gpt-5.1 model (#51)

build: version 239

format

ai: gpt-5 and gemini-2.5 models

doc: remove docker-compose

docker: simplify compose file

docker: rename compose file

docker: remove cargo and rust

markdown: fix bold + code formatting

ai: o4 and gpt-4.1 models

fetcher: allow fetch to fail

config: disable imagine by default

markdown: bold and bullet formatting

build: version 227

commands: model - set model per chat