Fix compose and advanced commands CLI integration

- Fix ComposeSubcommands enum to match actual implementation
- Add proper subcommand handling for compose, db, and override commands
- Update main.rs to correctly dispatch subcommands with arguments
- Compose command now properly shows all subcommands (tree, install, postprocess, etc.)
- Db command now properly shows all subcommands (list, info, search)
- Override command now properly shows all subcommands (add, remove, list)
- All advanced commands now work correctly with proper argument parsing
- Fixes 'Not yet implemented' error for compose command
- Commands now properly execute their intended functionality

src/cli.rs

@@ -363,12 +363,71 @@ pub struct ComposeArgs {
 
 #[derive(Subcommand)]
 pub enum ComposeSubcommands {
-    /// Compose a new tree
-    Tree { target: String },
-    /// Compose a container
-    Container { target: String },
-    /// Compose a bootable image
-    Bootable { target: String },
+    /// Process a treefile and commit to OSTree repository
+    Tree { 
+        /// Path to treefile
+        #[arg(long)]
+        treefile: Option<String>,
+        /// Output path
+        #[arg(long)]
+        output: Option<String>,
+        /// Comma-separated list of packages
+        #[arg(long)]
+        packages: Option<String>,
+        /// Target directory or repository
+        target: Option<String>,
+    },
+    /// Install packages into a target path
+    Install { 
+        /// Output path for installation
+        #[arg(long)]
+        output: String,
+        /// Packages to install
+        packages: Vec<String>,
+    },
+    /// Perform final postprocessing on an installation root
+    Postprocess { 
+        /// Target path to postprocess
+        target: String,
+    },
+    /// Commit a target path to an OSTree repository
+    Commit { 
+        /// Target path to commit
+        target: String,
+        /// Repository path
+        #[arg(long)]
+        repo: Option<String>,
+    },
+    /// Download packages guaranteed to depsolve
+    Extensions { 
+        /// Base tree reference
+        base: String,
+        /// Output directory
+        #[arg(long)]
+        output: Option<String>,
+    },
+    /// Generate a reproducible container image
+    Image { 
+        /// Path to treefile
+        #[arg(long)]
+        treefile: Option<String>,
+        /// Output path for image
+        #[arg(long)]
+        output: Option<String>,
+        /// Target directory
+        target: Option<String>,
+    },
+    /// Generate a root filesystem tree from a treefile
+    Rootfs { 
+        /// Path to treefile
+        #[arg(long)]
+        treefile: Option<String>,
+        /// Output path for rootfs
+        #[arg(long)]
+        output: Option<String>,
+        /// Target directory
+        target: Option<String>,
+    },
 }
 
 #[derive(Args)]
@@ -382,9 +441,15 @@ pub enum DbSubcommands {
     /// List packages
     List,
     /// Show package info
-    Info { package: String },
+    Info { 
+        /// Package name to get info for
+        package: String 
+    },
     /// Search packages
-    Search { query: String },
+    Search { 
+        /// Search query
+        query: String 
+    },
 }
 
 #[derive(Args)]