docs(NA): adds @kbn/plugin-discovery into ops devdocs

dev_docs/operations/operations_landing.mdx

@@ -28,6 +28,7 @@ layout: landing
     { pageId: "kibDevDocsOpsBabelPluginSyntheticPackages" },
     { pageId: "kibDevDocsOpsUiSharedDepsNpm" },
     { pageId: "kibDevDocsOpsUiSharedDepsSrc" },
+    { pageId: "kibDevDocsOpsPluginDiscovery" },
   ]}
 />
 

nav-kibana-dev.docnav.json

@@ -184,7 +184,8 @@
             { "id": "kibDevDocsOpsTypeSummarizer" },
             { "id": "kibDevDocsOpsBabelPluginSyntheticPackages" },
             { "id": "kibDevDocsOpsUiSharedDepsNpm" },
-            { "id": "kibDevDocsOpsUiSharedDepsSrc" }
+            { "id": "kibDevDocsOpsUiSharedDepsSrc" },
+            { "id": "kibDevDocsOpsPluginDiscovery" }
           ]
         },
         {

packages/kbn-plugin-discovery/README.mdx

@@ -0,0 +1,24 @@
+---
+id: kibDevDocsOpsPluginDiscovery
+slug: /kibana-dev-docs/ops/plugin-discovery
+title: "@kbn/plugin-discovery"
+description: A package with logic used to find plugins in the repository
+date: 2022-06-06
+tags: ['kibana', 'dev', 'contributor', 'operations', 'plugin', 'discovery']
+---
+
+At the moment plugins can live in a couple of different places and in the future will be able 
+to live anywhere in the repository. This is a package that holds custom logic useful to find and 
+parse those.
+
+## parseKibanaPlatformPlugin
+
+It returns a platform plugin for a given manifest path
+
+## getPluginSearchPaths
+
+It returns the paths where plugins will be searched for
+
+## simpleKibanaPlatformPluginDiscovery
+
+It finds and returns the new platform plugins