Updating/expanding pickable furniture

[Invalidated-User]

Summary

Content "Adds a locked display rack, makes the display case pickable, and removes the "MINEABLE" tag from all safe types."

Purpose of change

Allow the player to unlock display cases if they desire to repurpose them for displaying their own items as well as allowing the player to practice their lockpicking proficiency.

Add a locked display rack to create a method of justifying high-value items remaining unlooted in locations such as military surpluses, gun stores, hunting supply stores, etc. Increased strength requirement to destroy both racks to be in line with the difficulty of tearing sheet metal into pieces.

Took away the ability of the player to jackhammer their way into a safe. The thick metal walls of safes could not be pierced with a jackhammer, all that it would achieve would be indenting the walls of the safe and damaging its contents.

Describe the solution

added the "PICKABLE" tag to "t_displaycase" and created "t_displaycase_o" for its open state

created t_rack_l which has the "SEALED" and "PICKABLE" tags, which reverts to t_rack after being picked, and increased str necessary to destroy both rack types from 6 to 10.

Removed the "MINEABLE" tag from all safe types.

Describe alternatives you've considered

creating "t_displaycase_c" to allow the player to close the display case if they want as well as creating the "open_displaycase" examine action to allow the player to subsequently reopen the display case into "t_displaycase_o" after closing it. Couldn't figure out how it implement it in src\iexamine.h

Testing

Used a hairpin to unlock both the display cases and the locked racks and they turned into their unlocked states.

Tried to use both a jackhammer and a pick on a safe, which did not work. Used an acetylene torch and it did.