feat(client): add PipelineApiClient and admin components

- Add IPipelineApiClient interface in Core ApiContracts
- Add PipelineApiClient implementation extending ApiClientBase
- Create Components/Admin directory for admin UI components
- Add SqlQueryModal component for displaying SQL queries with copy-to-clipboard
- Add PipelineScheduleSection component for pipeline schedule display
- Register IPipelineApiClient in Program.cs DI container
- Add Admin components namespace to _Imports.razor

NEW/src/JdeScoping.Client/Services/PipelineApiClient.cs

@@ -0,0 +1,25 @@
+using JdeScoping.Core.ApiContracts;
+using JdeScoping.Core.ApiContracts.Pipelines;
+using JdeScoping.Core.ApiContracts.Results;
+
+namespace JdeScoping.Client.Services;
+
+/// <summary>
+/// HTTP client implementation for pipeline configuration API.
+/// </summary>
+public class PipelineApiClient : ApiClientBase, IPipelineApiClient
+{
+    public PipelineApiClient(HttpClient httpClient) : base(httpClient) { }
+
+    public Task<ApiResult<PipelineListResponse>> GetPipelineNamesAsync(CancellationToken ct = default)
+        => GetAsync<PipelineListResponse>(ApiRoutes.Pipelines.Base, ct);
+
+    public Task<ApiResult<PipelineConfigDto>> GetPipelineAsync(string name, CancellationToken ct = default)
+        => GetAsync<PipelineConfigDto>(ApiRoutes.Pipelines.GetByName(name), ct);
+
+    public Task<ApiResult<PipelineStatusResponse>> GetStatusAsync(string name, CancellationToken ct = default)
+        => GetAsync<PipelineStatusResponse>(ApiRoutes.Pipelines.GetStatus(name), ct);
+
+    public Task<ApiResult<PipelineExecutionsResponse>> GetExecutionsAsync(string name, int count = 30, CancellationToken ct = default)
+        => GetAsync<PipelineExecutionsResponse>(ApiRoutes.Pipelines.GetExecutions(name, count), ct);
+}