- Added possibility to copy an OAHashMap
- Added unit tests

This code is generously donated by IMVU.

Style: Remove unnecessary semicolons from `core`

[Windows] Add quotes only to the command line arguments with special characters.

Semicolons are not necessary after function definitions or control flow
blocks, and having some code use them makes things inconsistent (and
occasionally can mess up `clang-format`'s formatting).

Removing them is tedious work though, I had to do this manually (regex
+ manual review) as I couldn't find a tool for that. All other code
folders would need to get the same treatment.

Fixed kinematic body axis lock

Style: Fix unnecessary semicolons that confused clang-format

macOS add signing of DMG and ZIPed export

Removed const from OAHashMap iterator value

Update the permission string for Oculus hand tracking

Add new (and rename changed) core types to GDNative API.

Force using floats in cubemap coefficient

Added tests for ClassDB

Add night sky to PhysicalSkyMaterial

Fix certain characters being recognized as special keys on Windows when using the us international layout

Remove no longer needed patch to jpgd.cpp

SCons: Improve registration of compilation_db tool, check version

Fix certain characters being recognized as special keys in Windows when using the us international layout

Fix leaks and crashes in OAHashMap

There's a builtin `toolpath` option we can use for that, so no need to hack
around a custom `scons_site` path.

The script requires SCons 3.1.1 or later, so we enable it conditionally.

Follow-up to #32848.

This changes the way the lifespan of items is managed to be consistent.

Bonus: Simplify cases of destroy-then-emplace.

AudioDriverJavaScript buffer size calculation.

GLSL: Change shader type specifier from [vertex] to #[vertex]

Each driver used to define the (same) project settings values
`audio/mix_rate` and `audio/output_latency`, but the setting names are
not driver specific.
Overriding is still possible via platform tags.

Based on mix rate and expected latency.

The added `#` prevents clang-format from misinterpreting the meaning
of this statement and thus messing up the formatting of the next
lines up until the first `layout` statement.

Similarly, a semicolon is now enforced on `versions` defines to
prevent clang-format from messing up formatting and putting them
all on a single line. Note: In its current state the code will
ignore chained statements on a single line separated by a semicolon.

Also removed some extraneous lines missed in previous style changes
or added by mistake with said changes (e.g. after uniform definitions
that clang-format messes up somewhat too, but we live with it).

Add more missing node icons

Add `custom.py` to .gitignore

The default `custom.py` can be created at the root of the Godot
repository to initialize any SCons build options via file which are
specific to user.

Allow searching with keyboard input by default in PopupMenu

Clarify that variables pointing to an object don't become `null` when that object is freed, it just makes them invalid.

(cherry picked from commit ccf5703568ab7c33723f322088c83a7d9ebcf5a8)

See discussion in https://github.com/godotengine/godot-proposals/issues/43.

Implementation of the Godot Android Plugin configuration file

Document that Dictionary is always passed as reference