[FEAT] Add quantity price breaks

[jeebeez]

What does this PR do?

• Add quantity price breaks
• New table to save quote prices
• Save prices to the existing supplier part table when finalizing or ordering
• Update pricing based on quantity in BOM

Video Demo (if applicable):

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I confirm automated tests are in place that prove my fix is effective or that my feature works.

Checklist

• I haven't read the contributing guide
• My code doesn't follow the style guidelines of this project
• I haven't commented my code, particularly in hard-to-understand areas
• I haven't checked if my changes generate no new warnings

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