feat(mcp): add tool presets and audit commands

- Introduce reference MCP presets with installation/audit helpers and remove legacy connector lists.
- Add CLI `owlen tools` commands to install presets or audit configuration, with optional pruning.
- Extend the TUI :tools command to support listing presets, installing them, and auditing current configuration.
- Document the preset workflow and provide regression tests for preset application.

crates/owlen-cli/src/main.rs

@@ -11,6 +11,7 @@ use clap::{Parser, Subcommand};
 use commands::{
     cloud::{CloudCommand, run_cloud_command},
     providers::{ModelsArgs, ProvidersCommand, run_models_command, run_providers_command},
+    tools::{ToolsCommand, run_tools_command},
 };
 use mcp::{McpCommand, run_mcp_command};
 use owlen_core::config::{
@@ -53,6 +54,9 @@ enum OwlenCommand {
     /// Manage MCP server registrations
     #[command(subcommand)]
     Mcp(McpCommand),
+    /// Manage MCP tool presets
+    #[command(subcommand)]
+    Tools(ToolsCommand),
     /// Show manual steps for updating Owlen to the latest revision
     Upgrade,
 }
@@ -78,6 +82,7 @@ async fn run_command(command: OwlenCommand) -> Result<()> {
         OwlenCommand::Providers(provider_cmd) => run_providers_command(provider_cmd).await,
         OwlenCommand::Models(args) => run_models_command(args).await,
         OwlenCommand::Mcp(mcp_cmd) => run_mcp_command(mcp_cmd),
+        OwlenCommand::Tools(tools_cmd) => run_tools_command(tools_cmd),
         OwlenCommand::Upgrade => {
             println!(
                 "To update Owlen from source:\n  git pull\n  cargo install --path crates/owlen-cli --force"