Units AutoDeploy/DeployBlock on Ammo depletion

[Fryone]

Requires units to have:
'Ammo' > 0;
'IsSimpleDeployer=yes';
'Convert.Deploy='.

Parameters
'OnAmmoDepletion.AutoDeploy=true' - uses Deploy command on unit when Ammo gets 0.
'OnAmmoDepletion.DeployBlock=true' - all Deploy commands on unit will turn into AreaGuard/Guard if Ammo equals 0.

[Fryone]

For now 'OnAmmoDepletion.DeployBlock=true' turns Deploy command to AreaGuard/Guard, because I couldn't figure out to save previous command.

[MortonPL]

Hello, thank you for your contriburion. Here's a few notes on how to improve it (more in review comments):

It's a good idea to avoid nesting conditions if possible. Also, there's no need to use return at the end of a function body with no return type.

Please add an entry to CREDITS.md, docs/Whats-New.md and documentation.

[Starkku]

Given that this is clearly aimed towards using Ares' type conversion, I do feel like messing with the deploying functionality instead of directly using type conversion using the recently implemented functionality is bit of a questionable choice, however lifting the restriction on IsSimpleDeployer would possibly allow some niche usage with vehicle to building deployers, and doing it this way allows using existing deploying animations etc. without requiring a new bespoke implementation so perhaps it is not all bad. Besides the IsSimpleDeployer thing there are a couple of smaller things and one bigger design issue I'd like to see addressed.

[Metadorius]

Heads up, if you go to Files changed tab, you can apply review suggestions in batch to not create excessive commits.