fix!: wrap functions returns different node depending on cursor position

[armed]

Fixes issue when cursor is not placed correctly in some cases.

Solution: return range instead of node.

• all wrap functions now returns a wrapped range instead of a node (breaking)
• cursor.place_cursor now accepts either range as a table or a TSNode (backwards compatible)

This PR fixes the issue when ts.get_node_at_cursor returns different nodes depending on where the cursor is located.

Here are two tests, first one fails (when the cursor at the beginning of a node), but the second test works as expected.

  it("ts check fails", function()
    prepare_buffer({
      content = { "(a (b))" },
      cursor = { 1, 3 },
    })

    paredit.wrap.wrap_element_under_cursor("( ", ")")

    local parser = vim.treesitter.get_parser(0, vim.bo.filetype)
    parser:parse()
    local node = ts.get_node_at_cursor()
    -- here the returned node is `( (b))` which is not expected
    assert.are.equal("(b)", vim.treesitter.get_node_text(node, 0))
  end)

  it("ts check success", function()
    prepare_buffer({
      content = { "(a (b))" },
      cursor = { 1, 5 },
    })

    paredit.wrap.wrap_element_under_cursor("( ", ")")

    local parser = vim.treesitter.get_parser(0, vim.bo.filetype)
    parser:parse()
    local node = ts.get_node_at_cursor()

    assert.are.equal("(b)", vim.treesitter.get_node_text(node, 0))
  end)

[armed]

ts.node_at_cursor returns (b) in both this cases (a ( |(b))) and (a ( (b)|)) if buffer is initilally at this state, but fails if it happend after buffer modification by wrap function + parser:parse(), not sure why.