a-fold now select "conjoined" fold

[t9md]

• Old: a-fold just select current fold only.
• New: a-fold select all conjoined fold range.
  • select previous fold if previous fold end at startRow of current fold.
  • select next fold if next fold start at endRow of current fold.

// `y z`(yank), `d z`(delete) whole if/else-if/else clause
if (num === 1) {
  console.log(1)

} else if (num === 2) {
  console.log(2)

} else if (num === 3) {
  console.log(3)

} else {
  console.log(4)

}

// `y z`(yank), `d z`(delete) whole try/catch/finall clause
try {
  console.log(1);

} catch (e) {
  console.log(2);

} finally {
  console.log(3);

}