#84 Implement FmpPart

[andyyngo]

• FmpPart is implemented with value range from 0 to 1000
• Exception class created for this Value Object class
• hashcode(), equals(), toString and compareTo() are implemented accordingly
• Tests added.

[sorndotdev]

@andyyngo please assign yourself and link to the issue in the Github UI so that it automatically closes it in the next PR, like this:

[andyyngo]

Let me try it next time, but I dont think I got the right making any changes in your project directly.

[sorndotdev]

Let me try it next time, but I dont think I got the right making any changes in your project directly.

If you add a PR description like "Closes #106", then it will automatically link.
Let me know if you're able to change the PR assignee.