Factorize math constants

[QGarchery]

The purpose of this PR is to avoid defining the same constants multiple times, so they are all defined at the same place and used when needed

[github-actions[bot]]

Changes to gas cost

Generated at commit: a0a313dcc95e300398837df939413721dd2d5c9c, compared to commit: 61edcbd0a364ba9acd1b3e7caf8b65c719a3997f

🧾 Summary (20% most significant diffs)

Contract	Method	Avg (+/-)	%
MathRef contract	log2Naive	+343 ❌	+0.41%

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Full diff report 👇

| Contract | Deployment Cost (+/-) | Method | Min (+/-) | % | Avg (+/-) | % | Median (+/-) | % | Max (+/-) | % | # Calls (+/-) | |:-|-:|:-|-:|-:|-:|-:|-:|-:|-:|-:|-:| | **MathRef contract** | 238,081 (0) | _log2Naive_
_safeAbs_ | 84,964 (+343)
422 (+80) | **+0.41%**
**+23.39%** | 84,964 (+343)
422 (+80) | **+0.41%**
**+23.39%** | 84,964 (+343)
422 (+80) | **+0.41%**
**+23.39%** | 84,964 (+343)
422 (+80) | **+0.41%**
**+23.39%** | 1 (0)
1 (0) |

[MathisGD]

I'm not a big big fan. Btw, I'm still in favor of #57, which would naturally fix this issue.

[MerlinEgalite]

I'm not a big big fan. Btw, I'm still in favor of #57, which would naturally fix this issue.

not a big fan as well tbh

[QGarchery]

I don't have a strong opinion on it, but could you explain what you don't like about it @MathisGD @MerlinEgalite ?

[QGarchery]

Closing as it's not completely necessary, and it may be worth it to not factorize simple libraries