refactor: cleanup utils and expose lazy (#83)

Signed-off-by: Aaron Pham <contact@aarnphm.xyz>

lua/avante/utils.lua

@@ -1,66 +0,0 @@
-local Range = require("avante.range")
-local SelectionResult = require("avante.selection_result")
-local M = {}
----@param str string
----@param opts? {suffix?: string, prefix?: string}
-function M.trim(str, opts)
-  if not opts then
-    return str
-  end
-  if opts.suffix then
-    return str:sub(-1) == opts.suffix and str:sub(1, -2) or str
-  elseif opts.prefix then
-    return str:sub(1, 1) == opts.prefix and str:sub(2) or str
-  end
-end
-function M.trim_line_number_prefix(line)
-  return line:gsub("^L%d+: ", "")
-end
-function M.in_visual_mode()
-  local current_mode = vim.fn.mode()
-  return current_mode == "v" or current_mode == "V" or current_mode == ""
-end
--- Get the selected content and range in Visual mode
--- @return avante.SelectionResult | nil Selected content and range
-function M.get_visual_selection_and_range()
-  if not M.in_visual_mode() then
-    return nil
-  end
-  -- Get the start and end positions of Visual mode
-  local start_pos = vim.fn.getpos("v")
-  local end_pos = vim.fn.getpos(".")
-  -- Get the start and end line and column numbers
-  local start_line = start_pos[2]
-  local start_col = start_pos[3]
-  local end_line = end_pos[2]
-  local end_col = end_pos[3]
-  -- If the start point is after the end point, swap them
-  if start_line > end_line or (start_line == end_line and start_col > end_col) then
-    start_line, end_line = end_line, start_line
-    start_col, end_col = end_col, start_col
-  end
-  local content = ""
-  local range = Range.new({ line = start_line, col = start_col }, { line = end_line, col = end_col })
-  -- Check if it's a single-line selection
-  if start_line == end_line then
-    -- Get partial content of a single line
-    local line = vim.fn.getline(start_line)
-    -- content = string.sub(line, start_col, end_col)
-    content = line
-  else
-    -- Multi-line selection: Get all lines in the selection
-    local lines = vim.fn.getline(start_line, end_line)
-    -- Extract partial content of the first line
-    -- lines[1] = string.sub(lines[1], start_col)
-    -- Extract partial content of the last line
-    -- lines[#lines] = string.sub(lines[#lines], 1, end_col)
-    -- Concatenate all lines in the selection into a string
-    content = table.concat(lines, "\n")
-  end
-  if not content then
-    return nil
-  end
-  -- Return the selected content and range
-  return SelectionResult.new(content, range)
-end
-return M