feat: better cmake support (#21)

* feat: CMakeSettings.json

* chore: remove visual studio stuff
chore: move .clang-format to main directory

* feat: new file structure, easier to implement as a submodule within existing projects

* chore: we actually include some code now...

* chore: remove prebuilt libraries (oops)

* feat: new shader building script using cmake

* chore: add debug postfix specifier

* fix: forgot that windows builds use 4J_Render_PC for the render library

* fix: didn't add the output directory (where shaders are saved to) to the include directories of 4J_Render

impls/Windows_Libs/Render/shaders/screen_VS.hlsl

@@ -0,0 +1,48 @@
+/*
+MIT License
+
+Copyright (c) 2026 Patoke
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+cbuffer screenspace_constants : register(b9)
+{
+    float4 v_scaleoffset;
+};
+
+void VS_ScreenSpace(uint vertex_id : SV_VertexID, out float4 position : SV_POSITION, out float2 texcoord : TEXCOORD0)
+{
+    float2 corner = float2(
+        (vertex_id << 1) & 2,
+        vertex_id & 2
+    );
+
+    position = float4(corner * float2(2, -2) + float2(-1, 1), 1, 1);
+    texcoord = corner * 0.5 * v_scaleoffset.zw + v_scaleoffset.xy;
+}
+
+void VS_ScreenClear(uint vertex_id : SV_VertexID, out float4 position : SV_POSITION)
+{
+    float2 corner = float2(
+        (vertex_id << 1) & 2,
+        vertex_id & 2
+    );
+
+    position = float4(corner * float2(2, -2) + float2(-1, 1), 1, 1);
+}