cslt-tool should generate a readme file with arduino-cli commands to reproduce the build env

[fstasi]

cslt-tool should generate a README.md file instead of the result.json file. the markdown file should contain a series of pre-generated arduino-cli commands that allow users to recreate the build environment with all the required libraries/core and their versions

src: https://arduino.slack.com/archives/C01698YT7S4/p1642848544050000?thread_ts=1642783496.047700&cid=C01698YT7S4