feat: load application and repository configuration from env and TOML

Services/RepositoryConfig.cs

@@ -0,0 +1,71 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using RStein.TOML;
+
+namespace ForgejoReleaseSync.Services;
+
+public class RepositoryConfig
+{
+    public List<RepoSyncConfig> Repositories { get; set; } = [];
+}
+
+public class RepoSyncConfig
+{
+    public required string Name { get; set; }
+    public required string GithubUrl { get; set; }
+    public required string ForgejoUrl { get; set; }
+    public required string IncludeRegex { get; set; }
+    public required string ExcludeRegex { get; set; }
+}
+
+public abstract class RepoConfigLoader()
+{
+    public static async Task<RepositoryConfig> LoadConfigAsync(string configPath,CancellationToken token = default)
+    {
+        try
+        {
+            var toml = await File.ReadAllTextAsync(configPath, token);
+
+            var tables = await TomlSerializer.DeserializeAsync(toml, token);
+
+            var result = new RepositoryConfig();
+        
+            foreach (var table in tables)
+            {
+                if (table.Value is not TomlArray tableValues)
+                    continue;
+
+                foreach (var content in tableValues)
+                {
+                    if (content is not TomlTable fields)
+                        continue;
+                
+                    result.Repositories.Add(new RepoSyncConfig
+                    {
+                        Name = table.Key.ToString(),
+                        GithubUrl = GetRequiredString(fields, "GithubUrl"),
+                        ForgejoUrl = GetRequiredString(fields, "ForgejoUrl"),
+                        IncludeRegex = GetRequiredString(fields, "IncludeRegex"),
+                        ExcludeRegex = GetRequiredString(fields, "ExcludeRegex")
+                    });
+                }
+            }
+            return result;
+        }
+        catch (Exception e)
+        {
+            throw new InvalidDataException("Failed to load configuration file", e);
+        }
+        
+    }
+    
+    private static string GetRequiredString(
+        TomlTable table,
+        string key)
+    {
+        return (string?)table[key]
+               ?? throw new InvalidDataException(
+                   $"Missing required configuration property: {key}");
+    }
+}