Add model$format()

[rok-cesnovar]

Add

model$format(
   overwrite_file = FALSE,
   canonicalize = FALSE, # or list() with 'deprecations', 'parentheses', 'braces', 'includes'
   backup = TRUE
)

which by default prints the formatted file but can also overwrite the model and back it up before formatting. It can also utilize the canonicalizer. See stan-dev/cmdstanpy#539 for the cmdstanpy implementation