Implements the Modernizing radiation design document ( https://hackmd.io/@tgstation/rJNIyeBHt ) and replaces the current radiation sources with the new system, as well as replacing/removing a bunch of old consumers of radiation that either had no reason to exist, or could be replaced by something else.
Diverges from the doc in that items radiation don't go up like explained. I was going to, but items get irradiated so easily that it just feels pretty lame. Items still get irradiated, but it's mostly just so that radiation sources look cooler (wow, lots of stuff around going green), and for things like the geiger counter.
Instead of the complicated radiation_wave system, radiation now just checks everything between the radiation source and the potential target, losing power along the way based on the radiation insulation of whats in between. If this reaches too low a point (specified by radiation_pulse consumers), then the radiation will not pass. Otherwise, will roll a chance to irradiate. Uranium structures allow a delay before irradiating, so stay away!
Bring _HELPERS/_lists.dm to latest standards by:
-Adding proper documentation and fixing existing one
-Giving vars proper names
-Procs now use snake case as per standard (many files that use those procs will be affected)
## About The Pull Request
stop forgetting to include mapload, if you don't include it then every single subtype past it by default doesn't include it
for example, `obj/item` didn't include mapload so every single item by default didn't fill in mapload

## Regex used:
procs without args, not even regex
`/Initialize()`
procs with args
`\/Initialize\((?!mapload)((.)*\w)?`
cleanup of things i didn't want to mapload:
`\/datum\/(.)*\/Initialize\(mapload`
Converts most spans into span procs. Mostly used regex for this and sorted out any compile time errors afterwards so there could be some bugs.
Was initially going to do defines, but ninja said to make it into a proc, and if there's any overhead, they can easily be changed to defines.
Makes it easier to control the formatting and prevents typos when creating spans as it'll runtime if you misspell instead of silently failing.
Reduces the code you need to write when writing spans, as you don't need to close the span as that's automatically handled by the proc.
(Note from Lemon: This should be converted to defines once we update the minimum version to 514. Didn't do it now because byond pain and such)
* Adds explosion SFX to the blastcannon and explosive compressor
- Extracts the explosion SFX and screenshake proc from the SSexplosions explosion handling proc and lets the explosive compressor and blastcannon use it.
* Miscellaneous changes
- Adds defines for the internal explosion arglist keys
- Reverses the values of the explosion severity defines
- Changes almost everything that uses `/proc/explosion` to use named arguments
- Removes a whole bunch of argname = 0 in explosion calls.
* Removes named callback arguments.
* Changes the explosion signals to just use the arguments list
Adds a simple framework to let objects respond to explosions occurring inside of them.
Changes a whole bunch of explosions to use the object being exploded as the origin of the explosion rather than the turf the object is on.
Makes the explosive compressor and blastcannon actually use the TTVs they are given.
Adds support for things responding to internal explosions.
Less snowflake code for the explosive compressor and blastcannon calculating bomb range.*
Less confusing explosion severity defines.
Less opaque explosion arguments
*does not guarantee that the solution to letting them actually use the TTV is any less snowflake.
Removes all /datum/game_mode except dynamic. Eventually, all of mode and game_mode will be removed, and Dynamic will become an ingrained system. Every single other gamemode was unmaintained at best and poisoned other code at worst. Currently all tg servers run 24/7 Dynamic, so the time to act is now.
* Remove gamemode references from age checks
* Monkey
* Remove heretics
* Remove BBs
* Refactor uplinks and remove clown ops
* Remove nuke ops
* Removes and refactors cult
* Remove extended
* Remove and move out meteors
* Removes wizard
* Remove sandbox
* Remove changelings
* Remove traitors
* Remove revs
* Remove gangs
* Remove changing mode and voting for new gamemodes
* get_candidates signature fix
* Summon ERT and NERD in their own panel
* Remove some old unneeded age_check stuff
* Fix old signatures of get_uplink_items
* Use Extended like config for dynamic.json
* Fix discounted gear