Add scripts for resolving and verifying Chromium binary paths

- Implemented `chrome-path.js` to define functions for locating Chromium binaries across different platforms and nested directories.
- Added `verify-chromium.js` to check for the presence of the Chromium binary and log the results, including candidate paths checked.
- The scripts support Linux, Windows, and macOS environments, enhancing the flexibility of Chromium binary detection.

src/StellaOps.Cli/Plugins/CliPluginManifest.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+
+namespace StellaOps.Cli.Plugins;
+
+public sealed record CliPluginManifest
+{
+    public const string CurrentSchemaVersion = "1.0";
+
+    public string SchemaVersion { get; init; } = CurrentSchemaVersion;
+
+    public string Id { get; init; } = string.Empty;
+
+    public string DisplayName { get; init; } = string.Empty;
+
+    public string Version { get; init; } = "0.0.0";
+
+    public bool RequiresRestart { get; init; } = true;
+
+    public CliPluginEntryPoint? EntryPoint { get; init; }
+
+    public IReadOnlyList<string> Capabilities { get; init; } = Array.Empty<string>();
+
+    public IReadOnlyDictionary<string, string> Metadata { get; init; } =
+        new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+
+    public string? SourcePath { get; init; }
+
+    public string? SourceDirectory { get; init; }
+}
+
+public sealed record CliPluginEntryPoint
+{
+    public string Type { get; init; } = "dotnet";
+
+    public string Assembly { get; init; } = string.Empty;
+
+    public string TypeName { get; init; } = string.Empty;
+}