add new matrix mat3x4

Initial function being

glm_mat3x4_make

Signed-off-by: Vincent Davis Jr <vince@underview.tech>

docs/source/api_inline_array.rst

@@ -50,6 +50,7 @@ Follow the :doc:`build` documentation for this
    mat2x4
    mat3
    mat3x2
+   mat3x4
    mat4
    vec2
    vec2-ext

docs/source/mat3x4.rst

@@ -0,0 +1,30 @@
+.. default-domain:: C
+
+mat3x4
+======
+
+Header: cglm/mat3x4.h
+
+Table of contents (click to go):
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Macros:
+
+1. GLM_MAT3X4_ZERO_INIT
+#. GLM_MAT3X4_ZERO
+
+Functions:
+
+1. :c:func:`glm_mat3x4_make`
+
+Functions documentation
+~~~~~~~~~~~~~~~~~~~~~~~
+
+.. c:function:: void glm_mat3x4_make(float * __restrict src, mat3x4 dest)
+
+    Create mat3x4 matrix from pointer
+
+    | NOTE: **@src** must contain at least 12 elements.
+    Parameters:
+      | *[in]*  **src**  pointer to an array of floats
+      | *[out]* **dest** destination matrix3x4