doc: continue doc restructuring

Changing the folder structure will cause too many broken links for
external references (from other sites). So, let's put the content back
where it was before the reorg, and instead use the new persona-based
navigation to point to documents in the original locations.

Also, introduce redirects for some documents that no longer exits.

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

doc/developer-guides/images/boot-flow.dot

@@ -0,0 +1,6 @@
+digraph G {
+   rankdir=LR;
+   bgcolor="transparent";
+   UEFI -> "acrn.efi" -> "OS\nBootloader" ->
+     "SOS\nKernel" -> "ACRN\nDevice Model" -> "Virtual\nBootloader";
+}

doc/developer-guides/images/circle-square.dot

@@ -0,0 +1,9 @@
+digraph {
+   bgcolor="transparent"; rankdir=LR;
+   { a [shape=circle height="1" style=filled color=AntiqueWhite
+        label="Circle\nLabel"]
+     b [shape=box height="1" width="1" style="rounded,filled"
+        color="#F080F0" label="Square\nLabel"]
+   }
+   a -> b
+}

doc/developer-guides/images/gaspump.dot

@@ -0,0 +1,11 @@
+digraph gaspump {
+        rankdir=LR;
+        node [shape = circle;];
+        edge [color = grey; fontsize=10];
+        S0 -> S1 [ label = "Lift Nozzle" ]
+        S1 -> S0 [ label = "Replace Nozzle" ]
+        S1 -> S2 [ label = "Authorize Pump" ]
+        S2 -> S0 [ label = "Replace Nozzle" ]
+        S2 -> S3 [ label = "Pull Trigger" ]
+        S3 -> S2 [ label = "Release Trigger" ]
+}

doc/developer-guides/images/node-shape-edges.dot

@@ -0,0 +1,8 @@
+digraph {
+   bgcolor=transparent; rankdir=LR;
+   node [shape="rectangle" style="filled" color="lightblue"]
+   edge [fontsize="12" fontcolor="grey"]
+
+   "acrnprobe" -> "telemetrics-client" [label="crashlog\npath"]
+   "telemetrics-client" -> "backend"   [label="log\ncontent"]
+}

doc/developer-guides/images/record.dot

@@ -0,0 +1,4 @@
+digraph {
+   a [shape=record label="left | {above|middle|below} | <f1>right"]
+   b [shape=record label="{row1\l|row2\r|{row3\nleft|<f2>row3\nright}|row4}"]
+}

doc/developer-guides/images/trusty-boot-flow.dot

@@ -0,0 +1,10 @@
+digraph G {
+   rankdir=LR;
+   rank=same;
+   bgcolor="transparent";
+   uosl1 [label="UOS_Loader"]
+   acrn_init [shape=box style="rounded,filled" label="ACRN"]
+   acrn_switch [shape=box style="rounded,filled" label="ACRN"]
+   uosl2 [label="UOS_Loader"]
+   uosl1 -> acrn_init -> "Trusty" -> acrn_switch -> uosl2;
+}