update proposal.

[devnexen]

• snmalloc to last version.
• then adding a handful of available build options, diabling TLS support and LTO linkage.

[SchrodingerZhu]

For simplicity, I relaxed signed commit protection for main. Feel free to re-enable it if you find it proper.

To make signed commit, you will need to setup your GPG key with git. I personally almost always use git commit -Ss to create commits but it is just my own preference.

See also: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits