feat: parallel async processing and compact output mode

Major performance improvements:
- Parallel search execution across all queries
- Parallel article fetching with 10 concurrent limit
- Parallel embeddings with rate limiting (4 concurrent)
- Polly integration for retry resilience

New features:
- Add -v/--verbose flag for detailed output
- Compact single-line status mode with braille spinner
- StatusReporter service for unified output handling
- Query generation and errors hidden in compact mode
- ANSI escape codes for clean line updates

New files:
- Services/RateLimiter.cs - Semaphore-based concurrency control
- Services/StatusReporter.cs - Verbose/compact output handler
- Models/ParallelOptions.cs - Parallel processing configuration

All changes maintain Native AOT compatibility.

Program.cs

@@ -34,6 +34,11 @@ var longOption = new Option<bool>(
     description: "Give a long elaborate detailed answer"
 );
 
+var verboseOption = new Option<bool>(
+    aliases: ["-v", "--verbose"],
+    description: "Show detailed progress information"
+);
+
 var questionArgument = new Argument<string[]>(
     name: "question",
     description: "The question to ask"
@@ -127,11 +132,12 @@ var rootCommand = new RootCommand("OpenQuery - AI powered search and answer")
     queriesOption,
     shortOption,
     longOption,
+    verboseOption,
     questionArgument,
     configureCommand
 };
 
-rootCommand.SetHandler(async (chunks, results, queries, isShort, isLong, questionArgs) =>
+rootCommand.SetHandler(async (chunks, results, queries, isShort, isLong, verbose, questionArgs) =>
 {
     var question = string.Join(" ", questionArgs);
     if (string.IsNullOrWhiteSpace(question))
@@ -140,7 +146,7 @@ rootCommand.SetHandler(async (chunks, results, queries, isShort, isLong, questio
         return;
     }
 
-    var options = new OpenQueryOptions(chunks, results, queries, isShort, isLong, question);
+    var options = new OpenQueryOptions(chunks, results, queries, isShort, isLong, verbose, question);
     
     var apiKey = Environment.GetEnvironmentVariable("OPENROUTER_API_KEY");
 
@@ -183,6 +189,6 @@ rootCommand.SetHandler(async (chunks, results, queries, isShort, isLong, questio
         Console.Error.WriteLine($"\n[Error] An unexpected error occurred: {ex.Message}");
         Environment.Exit(1);
     }
-}, chunksOption, resultsOption, queriesOption, shortOption, longOption, questionArgument);
+}, chunksOption, resultsOption, queriesOption, shortOption, longOption, verboseOption, questionArgument);
 
 return await rootCommand.InvokeAsync(args);