Make 555 timers fully specified
- Split the original symbol into one per package
- Renamed symbols (and aliases) to include the package suffix
- Cleaned up documentation and keywords
This is a design breaking change I am however quite sure it is worth it. Especially as some of the old aliases already had the package suffix there but were assigned to a symbol that was generic. Plus the footprint filters used in that symbol did not fit all aliases.
Summary of the symbols we had in some form in the lib with their packages and relevant part numbers plus datasheets. https://docs.google.com/spreadsheets/d/1VMY6TS7239a-nVVFeL2KGmgWQvnMle-uqJrocWEhT4M/edit?usp=sharing