Integer.+ cannot be invoked "statically"

[JaroslavTulach]

As discussed at:

> Integer.round 123 -2
>>> 100
> Integer.+ 2 3
Evaluation failed with: Method `+` of type Integer.type could not be found.

that's an inconsistency. There is no point why + should be different than round from end user point perspective.

May be related to #6282.

[enso-bot]

Pavel Marek reports a new STANDUP for today (2023-08-18):

Progress: - Investigating why Integer.floor method does not exist.

• Seems like a problem with the hierarchy of Small_Integer -> Integer. It should be finished by 2023-08-25.

[enso-bot]

Pavel Marek reports a new STANDUP for today (2023-08-22):

Progress: - Started merging Small_Integer and Big_Integer into single Integer type. It should be finished by 2023-08-25.

[enso-bot]

Pavel Marek reports a new 🔴 DELAY for today (2023-09-06):

Summary: There is 19 days delay in implementation of the Integer.+ cannot be invoked "statically" (#6959) task.
It will cause 19 days delay for the delivery of this weekly plan.

Delay Cause: vacation

[enso-bot]

Pavel Marek reports a new STANDUP for today (2023-09-06):

Progress: - Merging BigInteger and SmallInteger.

• Fixing some nasty bugs in Runtime visualization tests It should be finished by 2023-09-13.

[enso-bot]

Pavel Marek reports a new STANDUP for today (2023-09-07):

Progress: - PR ready for review.

• Starting benchmarks to see any performance regressions.
• Fixed sort on= is broken #7702 - simple and easy fix
• Book club, triaging, ... It should be finished by 2023-09-13.