Refactor database schema and scanning process:

- Introduced `issues` table for detailed vulnerability storage.
- Enhanced `files` table with project scoping and unique constraints.
- Replaced `OutputFormat` enum with `String` for flexibility.
- Added support for formatted console output of scan results.
- Integrated file and issue updating logic for incremental scans.
- Optimized scanning by leveraging database-stored issues.

src/cli.rs

@@ -26,8 +26,8 @@ pub enum Commands {
         rebuild_index: bool,
 
         /// Output format
-        #[arg(short, long, value_enum, default_value = "table")]
-        format: OutputFormat,
+        #[arg(short, long, value_enum, default_value = "")]
+        format: String,
 
         /// Show only high severity issues
         #[arg(long)]
@@ -78,11 +78,3 @@ pub enum IndexAction {
         path: String,
     },
 }
-
-#[derive(clap::ValueEnum, Clone, Debug)]
-pub enum OutputFormat {
-    Table,
-    Json,
-    Csv,
-    Sarif,
-}