docs/migration: Create migration/ directory

Migration documentation is growing into a single file too large.  Create a
sub-directory for it for a split.

We also already have separate vfio/virtio documentations, move it all over
into the directory.

Note that the virtio one is still not yet converted to rST.  That is a job
for later.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/r/20240109064628.595453-2-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>

4 files changed, 1 insertions, 1 deletions

diff --git a/docs/devel/index-internals.rst b/docs/devel/index-internals.rst
index 3def4a138b..a41d62c1eb 100644
--- a/docs/devel/index-internals.rst
+++ b/docs/devel/index-internals.rst
@@ -11,7 +11,7 @@ Details about QEMU's various subsystems including how to add features to them.
    block-coroutine-wrapper
    clocks
    ebpf_rss
-   migration
+   migration/main
    multi-process
    reset
    s390-cpu-topology
diff --git a/docs/devel/migration.rst b/docs/devel/migration/main.rst
index 95351ba51f..95351ba51f 100644
--- a/docs/devel/migration.rst
+++ b/docs/devel/migration/main.rst
diff --git a/docs/devel/vfio-migration.rst b/docs/devel/migration/vfio.rst
index 605fe60e96..605fe60e96 100644
--- a/docs/devel/vfio-migration.rst
+++ b/docs/devel/migration/vfio.rst
diff --git a/docs/devel/virtio-migration.txt b/docs/devel/migration/virtio.txt
index 98a6b0ffb5..98a6b0ffb5 100644
--- a/docs/devel/virtio-migration.txt
+++ b/docs/devel/migration/virtio.txt