Allow `--genc` and `--list` arguments to be used in the same `sde generate` command

[chrispcampbell]

Currently the sde generate command only allows for one "operation" to be performed at a time. The build package therefore has to run sde generate twice (once with --genc then again with --list) which leads to redundant work. It would be better if we could make the internal parseAndGenerate function take an array of operations instead of a single operation, which would allow for multiple operations to be performed in the same invocation.

[chrispcampbell]

Running the transpiler with the new parsing code is already quite a bit faster than with the old. But by combining --genc and --list into a single step, our build times are even faster. Here are some performance numbers measured when building En-ROADS (M1 Max, times in seconds, lower is better):

parser	--genc only	--list only	before fix	after fix
old	6.8	4.4	11.2	7.6
new	4.7	4.8	9.5	5.3

In other words, before this fix, we'd perform a lot of redundant work by running --genc and --list in separate steps (see "before fix", which adds up the first two columns), but now that we can run them in a single command (see "after fix"), we shave off about 4 seconds from the build.