#373 Add quantizer module to netspresso

[Only-bottle]

Description

Please include a summary in English, of the changes in this pull request. If it closes an issue, please mention it here.

Closes: #373

You should link at least one existing issue for PR. Before your create a PR, please check to see if there is an issue for this change.
PRs from forked repository not accepted.

Change(s)

• Add quantizer metadata.
• Add quantizer module to netspresso.
• Add quantize example.