Script for generating a release note

[jkwak-work]

Related to #4718

When ran locally, the script prints the commit log with a command, git log --oneline --since 202X-YY-ZZ.
If there are any breaking changes, they will be printed first and the rest will be printed later.

Here is an example of how it looks like when ran,

slang/$ docs/scripts/release-note.sh 2024-08-01
Reminder: PLEASE make sure your local repo is up-to-date before running the script.
gh.exe is found from: /mnt/c/Program Files/GitHub CLI//gh.exe
=== Breaking changes ===
No breaking changes

=== Non breaking changes ===
d63f5e20f Allow a enum case to reference a previously defined value. (#4768) (#2893:forward looking)
69dd7f40e Perform type legalization on StructuredBuffer element. (#4767) (#4455:client support)
32b843215 Allow implicit 'uniform' entrypoint parameters. (#4765) (#4554:client support)