[Finishes #75065780] Add K1 Studio instructions
Hide concept videos for new courses
Flip logic
Remove unused method
Add test for concept <> video decoupling
Allow non-stage script levels in factory
Add survey feedback links for courses 1 & 2.
Add hole of unknown size note
Make singular [ci skip]
Merge pull request #1029 from code-dot-org/builder_unknown_hole_note

Add hole of unknown size note
Merge pull request #1024 from code-dot-org/hide_concept_videos_new_courses

Hide concept and game intro videos for non-legacy courses
Enabled testing of Stanford experiment.
Automatically built
Reverted files I didn't mean to commit.
Make script#feedback_url helper function.
Made improvements suggested by Laurel.
no camel case.
Merge pull request #1028 from code-dot-org/feedbacklinks

Add survey feedback links for courses 1 & 2.
Merge pull request #1032 from code-dot-org/k1_studio_instruction

[Finishes #75065780] Add K1 Studio instructions
Merge pull request #1031 from code-dot-org/stanford_experiment

Enabled testing of Stanford experiment.