* Expose type declarations in libSquoosh npm package
* Add comment on why we remove the tsbuildinfo
* Fix PreprocessOptions type
Resize should require at least one of the width, height.
The other options are optional for all preprocessors
* Update libSquoosh README to reflect encode changes
I also removed requiring `await image.decoded` call before calling
preprocess or encode since they decode the image before the operation
Instantiating and using multiple image pools is not intended and can
lead to memory problems. Instead, users should use a single pool and
reuse that pool across all image processing. Therefore, let's add
a warning in the README to specify call this out and avoid users
of running into issues.
Relates to #1065
