Versions after 5.0.5 emit tsrg2 instead of tsrg, breaking anything which reads
those files (e.g. Mixin and the preprocessor), later versions even bump the
required Gradle version.
Since MC provides no reliable way to get the connection while still in the login
phase, Fabric API tries to determine it either from MinecraftClient's connection
field (for the integrated server) or from the ConnectScreen (for multiplayer).
However, neither is present during a replay, leading to the aforementioned
error.
To fix this, we store our ClientConnection in MinecraftClient's connection
field. This should have no significant effect on vanilla behavior.
Also remove the dead Forge 1.14 code which was in the same place.
Creates a dedicated folder for each video and does not depend on ffmpeg, just
like the EXRWriter (but supporting all MC versions).
Also does 32 bit depth export by chunking the 32-bit float into the 8-bit BGRA
component channels.
That is, most of the business code should not be aware that it is being compiled
to multiple versions even when it heavily interacts with MC, preprocessor
statements should be an escape hatch, not the norm.
Similarly, code should not be forced to do `MCVer.getWindow(mc)` instead of the
much more intuitive `mc.getWindow()`, and a new preprocessor (technically remap)
feature makes this possible by defining "search and replace"-like patterns (but
smarter in that they are type-aware) in one or more central places (the
"Patterns.java" files) which then are applied all over the code base.
In a way, this is another step in the automatic back-porting process where
preprocessor statements are used when we cannot yet do something automatically.
Previously we "merely" automatically converted between different mapping, this
new feature now also allows us to automatically perform simple refactoring
tasks like changing field access to a getter+setter (e.g. `mc.getWindow()`), or
changing how a method is called (e.g. `BufferBuilder.begin`), or changing a
method call chain (e.g. `dispatcher.camera.getYaw()`), or most other
search-and-replace-like changes and any combination of those.
The only major limitation is that the replacement itself is not smart, so
arguments must be kept in same order (or be temporarily assigned to local
variables which then can be used in any order).
