Update leveling_tools.go to add new allocation of stats and skills

[Wamlad]

Stat and Skill point allocation updated for leveling characters, when the leveling script option is also set.
Stats are done per the d2go order of STR, ENG, DEX and VIT. Which should work well for leveling, reaching gear requirements and mana needs first.
Skills are allocated by comparing totals at the current char level. So it's not just allocating skill X at level Y. It takes into account what you've already skilled up.

Testing:

• Tested across characters (sorc & paladin leveling scripts)
• Tested on standard vs. legacy graphics.
• Tested at different char levels, with different stat settings including changing the order, including 0's, ommissions of certain stats.

Things to note:

• Several imports (math, slices, sort, strings) were needed to take character config inputs and manipulate them. I have no idea how inefficient this is, but I used them to turn the character settings into usable data in the for loops, no matter the char level, char settings order, ommissions etc.

I'm not a seasoned coder, so would appreciate feedback in making future PRs easy for you devs.
Also appreciate the leveling process in general isn't the main priority but I will be working away at pieces that I use.
This PR solves issue #640

[Antizerg]

The stat and skill assignment is working nicely, but the current code has us putting only into vita until level 20. We need to put some into strength asap so we can equip gear. I recommend at least 34 strength so we can wear a large shield for eventual Ancients Pledge.

[Wamlad]

Thanks for testing, and agreed re: strength. I’ve intentionally not amended any of the character scripts though whilst making this compatible. They can be class specific and people can amend their own. Theirs separate work being done on auto level/auto equip also, so that’s separate from this PR.

[Antizerg]

Thanks for testing, and agreed re: strength. I’ve intentionally not amended any of the character scripts though whilst making this compatible. They can be class specific and people can amend their own. Theirs separate work being done on auto level/auto equip also, so that’s separate from this PR.

Good point, I forgot the stat allocation is happening in the specific character go files.