Major refactoring: HTTP client unification and project restructuring

## HTTP Client Refactoring
- Create unified HttpClient module (src/http_client.rs)
- Refactor 24 files to use shared HTTP client
- Replace .unwrap() with proper error handling
- Eliminate code duplication in HTTP requests

## Project Restructuring
- Rename package: ai → aibot
- Add dual binary support: aibot (main) + ai (compatibility alias)
- Migrate config directory: ~/.config/ai/ → ~/.config/syui/ai/bot/
- Implement backward compatibility with automatic migration

## Testing Infrastructure
- Add unit tests for HttpClient
- Create test infrastructure with cargo-make
- Add test commands: test, test-quick, test-verbose

## Documentation
- Complete migration guide with step-by-step instructions
- Updated development guide with new structure
- HTTP client API reference documentation
- Comprehensive refactoring summary

## Files Changed
- Modified: 24 source files (HTTP client integration)
- Added: src/http_client.rs, src/alias.rs, src/tests/
- Added: 5 documentation files in docs/
- Added: migration setup script

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/feed_get.rs

@@ -1,33 +1,13 @@
-extern crate reqwest;
-use crate::data_refresh;
+use crate::http_client::HttpClient;
 use crate::url;
 
 pub async fn get_request(feed: String) -> String {
-    let token = data_refresh(&"access");
-    let url = url(&"feed_get");
-    let feed = feed.to_string();
-    //let col = "app.bsky.feed.generator".to_string();
+    let base_url = url(&"feed_get");
+    let url = format!("{}?feed={}", base_url, feed);
+    let client = HttpClient::new();
 
-    let client = reqwest::Client::new();
-    let res = client
-        .get(url)
-        .query(&[("feed", feed)])
-        //.query(&[("feed", feed), ("collection", col)])
-        .header("Authorization", "Bearer ".to_owned() + &token)
-        .send()
-        .await
-        .unwrap();
- 
-    let status_ref = res.error_for_status_ref();
-
-    match status_ref {
-        Ok(_) => {
-            return res.text().await.unwrap();
-        }
-        Err(_e) => {
-            let e = "err".to_string();
-            return e;
-        }
+    match client.get_with_auth(&url).await {
+        Ok(response) => response,
+        Err(_) => "err".to_string(),
     }
-
 }