refactor: Migrate from prettytable to comfy-table for output formatting

Co-authored-by: aider (openai/andrew/openrouter/deepseek/deepseek-chat-v3.1) <aider@aider.chat>

src/modes/common.rs

@@ -4,7 +4,6 @@ use crate::meta_plugin::MetaPluginType;
 use clap::Command;
 use clap::error::ErrorKind;
 use log::debug;
-use prettytable::format::TableFormat;
 use regex::Regex;
 use std::collections::HashMap;
 use std::env;
@@ -111,25 +110,6 @@ impl ColumnType {
 // impl TryFrom<&str> for ColumnType is already implemented by strum_macros
 // so we remove this conflicting implementation
 
-pub fn get_format_box_chars_no_border_line_separator() -> TableFormat {
-    prettytable::format::FormatBuilder::new()
-        .column_separator('│')
-        .borders('│')
-        .separators(
-            &[prettytable::format::LinePosition::Top],
-            prettytable::format::LineSeparator::new('─', '┬', '┌', '┐'),
-        )
-        .separators(
-            &[prettytable::format::LinePosition::Title],
-            prettytable::format::LineSeparator::new('─', '┼', '├', '┤'),
-        )
-        .separators(
-            &[prettytable::format::LinePosition::Bottom],
-            prettytable::format::LineSeparator::new('─', '┴', '└', '┘'),
-        )
-        .padding(1, 1)
-        .build()
-}