[vcpkg manifest] Add documentation! (#13488)

* [vcpkg docs] add docs for manifest files

These are just for the maintainer docs,
not user docs.

* [vcpkg] EBNF-ify platform expression parsing

this modifies nothing about what strings are accepted or rejected,
it just moves stuff around.

also adds tests.

* [vcpkg docs] add manifest mode example

* [wip] docs for augustin

also fix tabs

* [vcpkg manifest] switch to using maps for features

* Apply suggestions from code review

* un-experimentize format-manifest

* flesh out the user manifest mode docs

* CRs

* billy CRs

* final personal pass-thru

1 files changed, 6 insertions, 10 deletions

diff --git a/ports/ogre/vcpkg.json b/ports/ogre/vcpkg.json
index 133fb3cfb..d99c2e234 100644
--- a/ports/ogre/vcpkg.json
+++ b/ports/ogre/vcpkg.json
@@ -17,25 +17,21 @@
     "zlib",
     "zziplib"
   ],
-  "features": [
-    {
-      "name": "csharp",
+  "features": {
+    "csharp": {
       "description": "Build csharp bindings"
     },
-    {
-      "name": "d3d9",
+    "d3d9": {
       "description": "Build Direct3D9 RenderSystem"
     },
-    {
-      "name": "java",
+    "java": {
       "description": "Build Java (JNI) bindings"
     },
-    {
-      "name": "python",
+    "python": {
       "description": "Build Python bindings",
       "dependencies": [
         "python3"
       ]
     }
-  ]
+  }
 }