Adds configuration for Magic Rod behavior (official/eAthena).

[bWolfie]

Pull Request Prelude

• I have followed proper Hercules code styling.
• I have read and understood the contribution guidelines before making this PR.
• I am aware that this PR will be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

Adds a battleconf option for Magic Rod behavior, allowing a choice between official and old eAthena.

• Official: Every time you use the Magic Rod skill, the animation will occur.
• eAthena: The animation for Magic Rod will only occur when you absorb a spell.

Affected Branches:

Master.

Issues addressed:

None.

[HerculesWSAPI]

This change is 

[dastgirp]

Although the PR looks good, maybe @4144 or @MishimaHaruna need to decide whether to add this old behavior or not.

[bWolfie]

Re-did PR hoping it gets approved this time 😀

[AnnieRuru]

tested in-game already, works perfectly fine

accidentally press self review button hahaha

[AnnieRuru]

// Animation used here in official [Wolfie]
who is the person call Wolfie ?

I don't mind the comment, but the contact name might be misleading

[bWolfie]

That's me. It's a habit when I am editing src to comment my name. I will remove it.