Refactor OpenAPI usage in Razor components

Removed `@using Microsoft.OpenApi.Models` and related namespaces from various Razor component files to streamline OpenAPI model usage. Updated null checks to include opening braces for improved readability. Modified `_Imports.razor` to include new namespaces `BlazorOpenApi` and `BlazorOpenApi.Controls`, while removing outdated OpenAPI imports.

BlazorOpenApi/Controls/AnyControl.razor

@@ -1,6 +1,4 @@
-@using Microsoft.OpenApi.Any
-
-@if (Value != null)
+@if (Value != null)
 {
     <div class="e-item">
         @switch (Value.AnyType)

BlazorOpenApi/Controls/ComponentsControl.razor

@@ -1,4 +1,3 @@
-@using Microsoft.OpenApi.Models
 @if ( Value != null )
 {
     @if (Value.Schemas?.Count > 0)

BlazorOpenApi/Controls/DiscriminatorControl.razor

@@ -1,6 +1,4 @@
-@using Microsoft.OpenApi.Models
-
-@if (Value != null)
+@if (Value != null)
 {
     <div class="descriminator">
         <Text Value="@Value.PropertyName" />

BlazorOpenApi/Controls/ExampleControl.razor

@@ -1,7 +1,4 @@
-@using Microsoft.OpenApi.Any
-@using Microsoft.OpenApi.Models
-
-@if (Value != null || Example != null )
+@if (Value != null || Example != null )
 {
     <div class="e-title">
         @if (!string.IsNullOrWhiteSpace(Name))

BlazorOpenApi/Controls/HeaderControl.razor

@@ -1,8 +1,4 @@
-@using System.Text.Json
-@using Microsoft.OpenApi.Models
-@using Microsoft.OpenApi.Readers
-
-@if (Value != null)
+@if (Value != null)
 {
     <div class="header">
         <h1 class="h-title">@Value.Title <span class="h-version">@Value.Version</span></h1>

BlazorOpenApi/Controls/MediaTypeControl.razor

@@ -1,5 +1,3 @@
-@using Microsoft.OpenApi.Models
-
 @if (Value != null)
 {
     <div class="mt-body">

BlazorOpenApi/Controls/OperationControl.razor

@@ -1,8 +1,4 @@
-@using System.Text.Json
-@using Microsoft.OpenApi.Models
-@using Microsoft.OpenApi.Readers
-
-@if (Value != null)
+@if (Value != null)
 {
     <div class="op-header @OperationClass" @onclick="Expand">
         <div class="op-type">@Operation</div>

BlazorOpenApi/Controls/ParameterControl.razor

@@ -1,8 +1,4 @@
-@using System.Text.Json
-@using Microsoft.OpenApi.Models
-@using Microsoft.OpenApi.Readers
-
-@if (Value != null)
+@if (Value != null)
 {
     <tr>
         <td>

BlazorOpenApi/Controls/ParameterStyleControl.razor

@@ -1,6 +1,4 @@
-@using Microsoft.OpenApi.Models
-
-@if ( Value != null )
+@if ( Value != null )
 {
     <div class="p-style @StyleClass">@Value</div>
 }

BlazorOpenApi/Controls/ParametersControl.razor

@@ -1,8 +1,4 @@
-@using System.Text.Json
-@using Microsoft.OpenApi.Models
-@using Microsoft.OpenApi.Readers
-
-@if (Value?.Count > 0)
+@if (Value?.Count > 0)
 {
     <table class="op-params parameter">
         @foreach (var p in Value)

BlazorOpenApi/Controls/PathControl.razor

@@ -1,8 +1,4 @@
-@using System.Text.Json
-@using Microsoft.OpenApi.Models
-@using Microsoft.OpenApi.Readers
-
-@if (!string.IsNullOrWhiteSpace(Key) || Value != null)
+@if (!string.IsNullOrWhiteSpace(Key) || Value != null)
 {
     @if (!string.IsNullOrWhiteSpace(@Value?.Summary) || !string.IsNullOrWhiteSpace(Value?.Description))
     {

BlazorOpenApi/Controls/RequestBodyControl.razor

@@ -1,5 +1,3 @@
-@using Microsoft.OpenApi.Models
-
 @if (Value != null)
 {
     <div class="request">

BlazorOpenApi/Controls/ResponseControl.razor

@@ -1,5 +1,3 @@
-@using Microsoft.OpenApi.Models
-
 @if (ResolvedValue != null)
 {
     <div class="response">

BlazorOpenApi/Controls/ResponsesControl.razor

@@ -1,5 +1,3 @@
-@using Microsoft.OpenApi.Models
-
 @if (Value?.Count > 0)
 {
     <div class="responses">

BlazorOpenApi/Controls/SchemaChildControl.razor

@@ -1,6 +1,4 @@
-@using Microsoft.OpenApi.Models
-
-@if ( Value != null )
+@if ( Value != null )
 {
     <tr>
         <td>

BlazorOpenApi/Controls/SchemaControl.razor

@@ -1,6 +1,4 @@
-@using Microsoft.OpenApi.Models
-
-@if ( ResolvedValue != null )
+@if ( ResolvedValue != null )
 {
     <table class="schema">
         <SchemaChildControl Value="@ResolvedValue" Title="@Title" Required="@Required" Collapsed="@Collapsed"/>

BlazorOpenApi/Controls/ServersControl.razor

@@ -1,8 +1,4 @@
-@using System.Text.Json
-@using Microsoft.OpenApi.Models
-@using Microsoft.OpenApi.Readers
-
-@if (Value != null && Value.Count > 0)
+@if (Value != null && Value.Count > 0)
 {
     <h2>Servers</h2>
     <table class="servers">

BlazorOpenApi/_Imports.razor

@@ -1,4 +1,5 @@
-@using System.Net.Http
+@using BlazorOpenApi
+@using BlazorOpenApi.Controls
 @using Microsoft.AspNetCore.Authorization
 @using Microsoft.AspNetCore.Components.Authorization
 @using Microsoft.AspNetCore.Components.Forms
@@ -6,5 +7,8 @@
 @using Microsoft.AspNetCore.Components.Web
 @using Microsoft.AspNetCore.Components.Web.Virtualization
 @using Microsoft.JSInterop
-@using BlazorOpenApi
-@using BlazorOpenApi.Controls
+@using Microsoft.OpenApi.Any
+@using Microsoft.OpenApi.Models
+@using Microsoft.OpenApi.Readers
+@using System.Net.Http
+@using System.Text.Json