doc: simplify navigation with restored doc org

A few more tweaks to the site navigation since we moved the content back
to its original folder structure.

Remove the temporary "doc reorg in progress" banner.

Add reference to hardware in the "try" section.

Add link to the documentation home page in left nav pane.

Add additional redirects to handle external links to moved content.

Signed-off-by: David B. Kinder <david.b.kinder@intel.com>

doc/develop.rst

@@ -0,0 +1,63 @@
+.. _develop_acrn:
+
+Develop using ACRN
+##################
+
+.. toctree::
+   :maxdepth: 1
+
+   user-guides/acrn-shell
+   user-guides/kernel-parameters
+   user-guides/acrn-dm-parameters
+   user-guides/tools
+
+Selecting OS as a User VM
+*************************
+
+.. toctree::
+   :maxdepth: 1
+
+   tutorials/using_agl_as_uos
+   tutorials/using_celadon_as_uos
+   tutorials/building_uos_from_clearlinux
+   tutorials/using_ubuntu_as_sos
+   tutorials/using_vxworks_as_uos
+   tutorials/using_windows_as_uos
+
+Real time OS setup as User VM
+*****************************
+
+.. toctree::
+   :maxdepth: 1
+
+   tutorials/rt_linux
+   tutorials/using_zephyr_as_uos
+
+Tuning and debugging
+********************
+
+.. toctree::
+   :maxdepth: 1
+
+   tutorials/acrn-dm_QoS
+   tutorials/debug
+   tutorials/increase-uos-disk-size
+   tutorials/open_vswitch
+   tutorials/rtvm_workload_design_guideline
+   tutorials/sgx_virtualization
+   tutorials/sign_clear_linux_image
+   tutorials/skl-nuc
+   tutorials/static-ip
+   tutorials/using_cat_on_up2
+   tutorials/using_partition_mode_on_nuc
+   tutorials/using_partition_mode_on_up2
+   tutorials/using_sbl_on_up2
+
+Other topics
+************
+
+.. toctree::
+   :maxdepth: 1
+
+   tutorials/agl-vms
+   tutorials/trustyACRN