Default to not relay player's neo_fov to 1st person specator, add ADS FOV transition for spec, use script AimFov

[nullsystem]

Description

• neo_fov ConVar fixed, now set to only define client-side and also used as such instead of the weird server->client routing before. However the server-side will still need to utilize it for server-player and for relay-mode neo_fov_relay_spec 1
• neo_fov_relay_spec new ConVar, defaults to disabled which uses client's neo_fov for 1st person spec. If enabled, relays spectated player's neo_fov to whoever spectating the player in 1st person
• Spectator looking at a player switching aim/unaim will now get a gradual rather than instant FOV transition. This transition is done differently by percentage of time verses delta used on player's main FOV, however it works well enough to show the spectator a gradual effect.
• Use AimFov for ADS FOV, fix some missing AimFov in scripts
• neo_fov min FOV changed from 60 to 75, default to 75

Toolchain

• Linux GCC Distro Native Arch/GCC 14

Linked Issues

• fixes #389

[nullsystem]

@Rainyan I don't think it was consistent before either, but anyway it should be now be immediate when neo_fov setting gets applied.

[Rainyan]

@Rainyan I don't think it was consistent before either, but anyway it should be now be immediate when neo_fov setting gets applied.

This fixes the FOV change not being applied. But it seems our aim FOV is now somehow coupled to the base FOV. For example, if you set neo_fov 75 and try aiming, it pulls the viewmodel in but your actual FOV doesn't change at all, i.e. there is no "zooming" occurring. I'm assuming we'd want the zoom FOV change to be the same ratio as it is in original NT, decoupled from whatever value the FOV we're zooming from might be.

[nullsystem]

@Rainyan Whoops look like GetMinFOV shouldn't been altered. Try it now. MIN_FOV's only for neo_fov setting now. The zooming in values is taken straight from the scripts so it should be those instead.