chore(std.mem): Rename `trimLeft` and `trimRight`

Rename `trimLeft` to `trimStart`, and `trimRight` to `trimEnd`.
`trimLeft` and `trimRight` functions remain as deprecated aliases for
these new names.
5fc4448e45Shun Sakai committed on 4/27/2025, 9:03:59 AMparent3783b1b
22 files changedLine totals unavailable