fix: make CLI scripts executable

[stdlib-bot]

This PR changes the permissions of project cli scripts to be executable.

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
string/num-code-points	$\color{green}132/132$ $\color{green}+100.00\%$	$\color{green}11/11$ $\color{green}+100.00\%$	$\color{green}1/1$ $\color{green}+100.00\%$	$\color{green}132/132$ $\color{green}+100.00\%$

The above coverage report was generated for the changes in this PR.