New `ExplicitInt` type

[LVMVRQUXL]

Description

Introduce a new ExplicitInt type in the kotools.types package having the same feature of the kotools.types.number.IntHolder type.

Checklist

• [x] Add the kotools.types.ExplicitInt interface.
• [x] Add binary operations to the new type.
• [x] Add conversions to the new type.
• [x] Deprecate the kotools.types.number.IntHolder type.
• [x] Update Work in progress section in changelog.

[LVMVRQUXL]

Done.

[LVMVRQUXL]

Add the rem operations to this new ExplicitInt type.

[LVMVRQUXL]

Done.