remove duplicate type name 'Platform' and 'Tag' (#483)

Try and remove duplicate type names for 'Platform' and 'Tag' based on my findings using the full file avaliable here: https://vrchat.community/openapi.yaml

Not fully sure how this file gets assembled so have tried to do it as close to what I saw used other places in the same files

#482

Author: McHauge

openapi/components/parameters.yaml

@@ -274,7 +274,7 @@ platform:
   in: query
   required: false
   schema:
-    type: string
+    $ref: ./schemas/Platform.yaml
   description: The platform the asset supports.
 noplatform:
   name: noplatform
@@ -295,28 +295,28 @@ tag:
   in: query
   required: false
   schema:
-    type: string
+    $ref: ./schemas/Tag.yaml
   description: Tags to include (comma-separated). Any of the tags needs to be present.
 include:
   name: include
   in: query
   required: false
   schema:
-    type: string
+    $ref: ./schemas/Tag.yaml
   description: Tags to include (comma-separated). Any of the tags needs to be present.
 require:
   name: require
   in: query
   required: false
   schema:
-    type: string
+    $ref: ./schemas/Tag.yaml
   description: Tags to include (comma-separated). All of the tags needs to be present.
 notag:
   name: notag
   in: query
   required: false
   schema:
-    type: string
+    $ref: ./schemas/Tag.yaml
   description: Tags to exclude (comma-separated).
 search:
   name: search

openapi/components/schemas/CurrentUser.yaml

@@ -165,7 +165,7 @@ properties:
         isMobile:
           type: boolean
         platform:
-          type: string
+          $ref: ./Platform.yaml
           nullable: true
         recorded:
           type: string

openapi/components/schemas/CurrentUserPresence.yaml

@@ -30,7 +30,7 @@ properties:
     type: string
     nullable: true
   platform:
-    type: string
+    $ref: ./Platform.yaml
     description: either a Platform or an empty string
     nullable: true
   profilePicOverride:

openapi/components/schemas/DynamicContentRow.yaml

@@ -9,7 +9,7 @@ properties:
     type: string
   platform:
     minLength: 1
-    type: string
+    $ref: ./Platform.yaml
     description: 'Usually "ThisPlatformSupported", but can also be other values such as "all" or platform specific identifiers.'
   sortHeading:
     minLength: 1
@@ -23,7 +23,7 @@ properties:
   tag:
     description: Tag to filter content for this row.
     minLength: 1
-    type: string
+    $ref: ./Tag.yaml
   type:
     type: string
     example: avatar

openapi/components/schemas/LimitedUserInstance.yaml

@@ -48,7 +48,7 @@ properties:
     nullable: true
     format: date-time
   platform:
-    type: string
+    $ref: ./Platform.yaml
   profilePicOverride:
     type: string
   profilePicOverrideThumbnail:

openapi/components/schemas/NotificationDetailRequestInvite.yaml

@@ -1,7 +1,7 @@
 properties:
   platform:
     description: 'TODO: Does this still exist?'
-    type: string
+    $ref: ./Platform.yaml
   requestMessage:
     description: Used when using InviteMessage Slot.
     type: string