Codechange: automatic adding of _t to (u)int types, and WChar to char32_t

for i in `find src -type f|grep -v 3rdparty/fmt|grep -v 3rdparty/catch2|grep -v 3rdparty/opengl|grep -v stdafx.h`; do sed 's/uint16& /uint16 \&/g;s/int8\([ >*),;[]\)/int8_t\1/g;s/int16\([ >*),;[]\)/int16_t\1/g;s/int32\([ >*),;[]\)/int32_t\1/g;s/int64\([ >*),;[]\)/int64_t\1/g;s/ uint32(/ uint32_t(/g;s/_uint8_t/_uint8/;s/Uint8_t/Uint8/;s/ft_int64_t/ft_int64/g;s/uint64$/uint64_t/;s/WChar/char32_t/g;s/char32_t char32_t/char32_t WChar/' -i $i; done

Fix #10638: Incorrect water infra total when building canal over object

In the case where the object is on an unowned canal tile and
the new canal tile is owned

Codechange: pass "ground vehicle" to GetTileSlopeZ since for tunnel/bridges there are two states

Previously it checked the position in non-driving direction to "guess" whether
a ground vehicle was using the function, so on tunnels/bridges it could either
return the Z of the (virtual) ground compared to the Z of the path the vehicle
would take.

Fix #9869: remove docking tile when doing a clear square

Terraforming through objects placed on water didn't properly remove docking tiles as expected.

By moving some logic regarding removal of docking tiles into DoClearSquare, the issue is solved, while also simplifying code, avoiding repetition elsewhere.

Codechange: Template DoCommand to automagically reflect the parameters of the command proc.

When finished, this will allow each command handler to take individually
different parameters, obliviating the need for bit-packing.

Codechange: Make TileIndex a "strong" typedef to give it a distinct type.

This is accomplished by changing it to a single member struct with the
appropriate operator overloads to make it all work with not too much
source modifications.

Codechange: Let the compile generate the master command table out of templated command traits.

This is using a non-intrusive type-traits like templated system, which
allows compile-time validation that the command table and the command
enum match up.

Fix: Incorrect error messages on placing water on scenario editor (#9560)

Additionally changes the behaviour of placing sea on sea/river/canal and placing canal/river on canal to (over)build, instead of disallowing it

Fix: wrong error message when building canals over ship depots / locks

IsTileType() also considers ship depots and locks water. IsWaterTile() does the right thing.

Fix: reduce cost of building canals over objects on sea

It is not like we will drain the sea first, to put water back in it after.
Besides, the cost for draining the sea isn't calculated for all other cases either.

Fix #7611: keeps news about accidents around after vehicle is cleaned up (#8497)

When a vehicle is cleaned up, all news that points to the news is
also removed. This was a bit evil, as it would also remove any
news related to crashed, acting like the crash never happened.
This left players a bit in the dark what was going on exactly.