Add STEP_TP_CONSUMED modifier, apply item mods

[claywar]

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• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

Implements STEP_TP_CONSUMED modifier and applies to TODO items in item_mods.sql.

Steps to test these changes

Equip Setan Kober (or other DNC JSE weapon), see TP consumed reduced on using a step