Fix -Wnon-literal-null-conversion and -Wconstant-conversion warnings

See merge request !1929

Fix IT and ctf flag sign interpolation

See merge request !1939

Re-add code that sets MF2_AMBUSH if MTF_AMBUSH is set, but only for binary maps

Closes #958

See merge request !1937

Linedef type 14 UDMF conversion: Don't fill stringargs[0] if toptexture is empty

Closes #973

See merge request !1936

Move emblem float option to args[1], since args[0] is already occupied for NiGHTS emblems

Closes #963

See merge request !1935

Deprecated map effect stuff

Closes #956

See merge request STJr/SRB2!1933

Fixes Issue #711

See merge request STJr/SRB2!1907

Fixes issue #568

Closes #568

See merge request STJr/SRB2!1913

Fixes Issue #912

Closes #912

See merge request STJr/SRB2!1909

Fix wrong flag being checked in P_ProcessTeamBase

Closes #957

See merge request !1938

-Add missing unsupported effect warnings to P_WriteTextmap
-Apply spikes MSF_TRIGGERSPECIAL_TOUCH hack in UDMF too

fix ARM builds being completely broken

Conditionally adds -mno-ms-bitfields based on architecture, as this is
only relevant on Intel architectures.

https://github.com/STJr/SRB2/pull/514

If merged, this is the quickest approach to resolve https://github.com/STJr/SRB2/issues/513

...alternatively, we could just remove the option altogether but I don't have the time right now to test whether it's needed or not

To the best of my knowledge, this covers all possible amd64 `CMAKE_SYSTEM_PROCESSOR` values based on what I'm seeing at https://stackoverflow.com/questions/70475665/what-are-the-possible-values-of-cmake-system-processor

Change gamepad defaults for 2.2.11

Closes #813

See merge request !1928

EV_DoFloor: Set dummy tag correctly for chained linedef executing

Closes #932

See merge request !1898

Re-add P_ThingOnSpecial3DFloor for Lua backwards compatibility

See merge request !1905

UDMF: Use string values for the sector "triggerer" field

See merge request !1902

Disable exit sectors in non-NiGHTS special stages because they interfere with the pits

Closes #930

See merge request STJr/SRB2!1900

Revert Gamepads for now

See merge request !1926

Handle splitscreen lua hud lists separately

Closes #935

See merge request !1925

Invert OpenGL rollangle for papersprites to match software renderer behaviour

Closes #849

See merge request !1924

Minor interpolation fixes

Closes #900, #906, and #916

See merge request !1923

This reverts commit 696e2ab9, reversing
changes made to d98d5949.

This reverts commit 7f1cafcd, reversing
changes made to 696e2ab9.

This reverts commit 7d8e8e20, reversing
changes made to 7f1cafcd.

This reverts commit 6428d6fc.