Add support for structured YAML output

[stephenswat]

This commit adds a new --yaml-out flag to OSACA which allows the user to dump the results of an analysis to a YAML file, allowing them to analyse the file more easily. I have tried to make the output as comprehensive as possible.

Happy to discuss about format, flag names, and all of that, of course. :slightly_smiling_face:

[JanLJL]

Hi @stephenswat,

thanks for this addition!

I changed a few things:

• [x] I added all items from a kernel object to the YAML output (i.e., added line_number, operands, semantic_operands, directive, comment)
• [x] I renamed LcdWarning to LCDWarning in the YAML output
• [x] I added the micro-architecture to the header to match the string-based header
• [x] I converted all numbers to floats to be free of any ruamel.yaml-specific data types in the YAML file
• [x] I added tests for dict creation of the analysis

If the current status is OK with you and fulfills all your needs, I give green light for merging

[stephenswat]

Hi Jan, thanks for the extensive changes. This is perfect!