Copy changes from the no-history fork, generated back in 2023

Original commit message:
> commit f138311d2d2e0cc9ba0496d523bb46f2c1c9fb73
> Author: rtk0c <[email protected]>
> Date:   Wed Sep 20 23:58:58 2023 -0700
>
>     Copy from the PlasticSCM repo, replace vendored glm wtih conan

In reality, this also introduced a few uncommitted changes in the
original PlasticSCM repo. See the modified and new files in this patch.

1 files changed, 0 insertions, 58 deletions

diff --git a/3rdparty/glm/source/test/ext/ext_vector_packing.cpp b/3rdparty/glm/source/test/ext/ext_vector_packing.cpp
deleted file mode 100644
index d7cbce2..0000000
--- a/3rdparty/glm/source/test/ext/ext_vector_packing.cpp
+++ /dev/null
@@ -1,58 +0,0 @@
-#include <glm/ext/vector_packing.hpp>
-#include <glm/ext/vector_relational.hpp>
-#include <glm/ext/vector_uint2_sized.hpp>
-#include <glm/ext/vector_int2_sized.hpp>
-#include <glm/gtc/packing.hpp>
-#include <glm/vec2.hpp>
-#include <vector>
-
-int test_packUnorm()
-{
-	int Error = 0;
-
-	std::vector<glm::vec2> A;
-	A.push_back(glm::vec2(1.0f, 0.7f));
-	A.push_back(glm::vec2(0.5f, 0.1f));
-
-	for (std::size_t i = 0; i < A.size(); ++i)
-	{
-		glm::vec2 B(A[i]);
-		glm::u16vec2 C = glm::packUnorm<glm::uint16>(B);
-		glm::vec2 D = glm::unpackUnorm<float>(C);
-		Error += glm::all(glm::equal(B, D, 1.0f / 255.f)) ? 0 : 1;
-		assert(!Error);
-	}
-
-	return Error;
-}
-
-int test_packSnorm()
-{
-	int Error = 0;
-
-	std::vector<glm::vec2> A;
-	A.push_back(glm::vec2(1.0f, 0.0f));
-	A.push_back(glm::vec2(-0.5f, -0.7f));
-	A.push_back(glm::vec2(-0.1f, 0.1f));
-
-	for (std::size_t i = 0; i < A.size(); ++i)
-	{
-		glm::vec2 B(A[i]);
-		glm::i16vec2 C = glm::packSnorm<glm::int16>(B);
-		glm::vec2 D = glm::unpackSnorm<float>(C);
-		Error += glm::all(glm::equal(B, D, 1.0f / 32767.0f * 2.0f)) ? 0 : 1;
-		assert(!Error);
-	}
-
-	return Error;
-}
-
-int main()
-{
-	int Error = 0;
-
-	Error += test_packUnorm();
-	Error += test_packSnorm();
-
-	return Error;
-}