docs: man: Create virtual memory related manpages

Signed-off-by: Ian Moffett <ian@osmora.org>

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+.\" Copyright (c) 2023 Ian Marco Moffett and the Osmora Team.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions are met:
+.\"
+.\" 1. Redistributions of source code must retain the above copyright notice,
+.\"    this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of Hyra nor the names of its
+.\"    contributors may be used to endorse or promote products derived from
+.\"    this software without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+.\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+
+.Dd December 15, 2023
+.Dt VM 9
+.Os
+.Sh NAME
+.Nm vm - hyra kernel dynamic memory allocation
+.Sh SYNOPSIS
+.In vm/dynalloc.h
+
+.Sh DESCRIPTION
+This subsystem is an abstraction over the Two-Level Segregated
+Fit memory allocator and provides wrappers for allocating, reallocating
+and deallocating memory from a pool allocated per-core.
+
+The
+.Ft dynalloc()
+function is analogous to malloc() in other systems.
+
+The
+.Ft dynrealloc()
+function is analogous to realloc() in other systems.
+
+The
+.Ft dynfree()
+function is analogous to free() in other systems.
+
+.Sh AUTHORS
+.An Ian Moffett Aq Mt ian@osmora.org