Modifiers: decrease maximum allocation size for Weld vertices

At the time of allocating the buffer with vertices in context, we don't
know exactly how many vertices are affected, but we do know that it is
less than or equal to twice the number of vertices killed.

Fix T94113: Local view + Geometry Nodes is broken for instances

`GeometrySet::compute_boundbox_without_instances` may not initialize min
max in some cases such as meshes without vertices.

This can result in a Bounding Box with impossible dimensions
(min=FLT_MAX, max=-FLT_MAX).

So repeat the same solution seen in `BKE_object_boundbox_calc_from_mesh`
and set boundbox values to zero.

Reviewed By: HooglyBoogly

Differential Revision: https://developer.blender.org/D13664

gpu.types.GPUOffScreen: accept format argument for color texture

Some projects need more than 8-bit RGBA off-screen, so add the ability to
accept color format and defaults to RGBA8 so existing code should not be
affected.

Currently supported formats:
- RGBA8 (default)
- RGBA16
- RGBA16F
- RGBA32F

Reviewed By: mano-wii

Differential Revision: https://developer.blender.org/D13650

Cleanup: Use indices instead of pointers

This improves code readability.

Take the opportunity and improve the comments too.

Fix T93408: Snap performance regression at high poll rate

Caused by {rBfba9cd019f21f29bad1a6f3713370c5172dbc97f}.

The snap timer was accidentally modified and damaged.

Fix T94191: correct (time) translation headers not showing DeltaX

Caused by {rBb0d9e6797fb8}

For the header (both Graph Editor case in general `headerTranslation` as
well as `headerTimeTranslate`) we are interested in deltas values
(not absolute values).

Since culprit commit, `snapFrameTransform` was not working with deltas
anymore, but we have to compensate for this.

For the Graph Editor, this only worked "by accident" in rB7192e57d63a5,
since `ival` is still zero at this point.

So now, reacquire the delta right after the snap operation.

Also use a more appropriate center value in the translate operator.

Maniphest Tasks: T94191

Differential Revision: https://developer.blender.org/D13641

Fix T94184: Outliner: Collection dragging tooltip is not updating

In the context of the dragdrop tooltip, the event referenced to the window
is out of date and contains invalid `mval` values.

Avoid using `win->eventstate` as much as possible.

Fix T94109: 3d cursor crash when using shortcut

Operator was erroneously starting edge_slide operation.

Revert part of the changes in rB3fab16fe8eb4 as obedit_type was being
confused with object_mode.

Fix T93687: Transform Gpencil vertices not working if scale is zero

Solution similar to rBd5cefc1844cf.

Basically the problem occurs because `td->smtx` was set to zero matrix.

Fix T93869: snap cursor may fail in orthographic view

Float precision issues cause the `ED_view3d_win_to_3d_on_plane` to return
a value even when the view ray is parallel to the plane.

A more general solution might be desired in this case, as other areas that
use `ED_view3d_win_to_3d_on_plane` might have the same problem.

For now, just work around the problem for the snap cursor.