Lesson Plan Block Patterns order and naming scheme

[vagelisp]

To ensure English Block Pattern is the first on the list, I created PR #1044 to rename the English Block Pattern to 00-en-lesson-plan.php. The 00 prefix will force the block pattern to always be the first option on the pattern selector. After that, the rest block patterns will follow based on their prefix order.

My suggestion for the file names is to use the WP Locale as a prefix, just like I did with the Greek block pattern.

So following this naming scheme {wp-locale}-lesson-plan, the Greek Lesson Plan Block Pattern file name is el-lesson-plan.php; the Gujarati would be gu-lesson-plan.php and so on.