Un-privatize some melee verb stuff

[CMDR-Bill-Doors]

Changes

Changed some privates to protected virtual for extendability

Reasoning

-I'm bothered enough by custom melee verbs that I have to do this to make CE versions of them.

Alternatives

-Reflect everything.

Testing

Check tests you have performed:

• [x] Compiles without warnings
• [ ] Game runs without errors
• [ ] Playtested a colony (specify how long)

[github-actions[bot]]

You can download the rebuilt assembly for this PR here: https://combatextended.lp-programming.com/CombatExtended-9675591748.zip