Fix bug in windows TCP poll function

Bug introduced when implementing TCP disconnection detection.
(too much yank-paste).
Fixes #7545

Working on compile issues for iOS

Fix compile errors related to audio on OSX

clang-format does not play well with tab-aligned multiline statements...
Some more research will be needed if we want to set a column limit.

clang-format does not handle that well *at all*.

For the reference, found the relevant pieces of code with:
`ag "=[ "$'\t'"]?"$'\n'"[ "$'\t'"]?{" --ignore=thirdparty`

Made sure files in core/ and tools/ have a proper Godot license header
when written by us. Also renamed aabb.{cpp,h} and object_type_db.{cpp,h}
to rect3.{cpp,h} and class_db.{cpp,h} respectively.

Also added a proper header to core/io/base64.{c,h} after clarifying
the licensing with the original author (public domain).

.gitignore: Added VC++ cache database and temporary storage folder when debugging
[ci skip]

Fix error while JSON::parse with empty string

Improve Web export presentation

Use Animation's Name as Filename When Saving

Matrix32 -> Transform2D

TCP connect always opens the correct socket type

Core motion implementation for iPhone (Accelerometer/Gyro/Magnetometer support)

When clang-format sorts includes alphabetically, MethodBind breaks.
Trying to move the object.h include upward in method_bind.h does
not seem to fix the problem, this needs investigation.

Adds pattern matching to GDScript

Redefine var results in an error

Add modulate (color) to TileSet tiles

Will now try to use the existing animation's name for filename, defaults to previous value in case there's no name

String: plus_file(String) no longer adds a root

Fix _Directory::get_current_drive error condition from breaking the build