SICP JS: Rework program snippets

[samuelfangjw]

Description

This PR is dependent on source-academy/sicp#545.

1. Fixes Env viz: wrong line highlighted when code is folded #1830.
2. Reworked how snippet dependencies are hidden. Dependencies are now hidden by code folding instead. This solves the environment model not working with dependencies bug and the bug where some program snippets cannot be run when dependencies are hidden because the prepend was evaluated in a different scope to the main body.

In the image above, taken from the third program snippet in section 3.2.3, lines 2 to 15 are hidden. A user can click on the yellow button to reveal dependencies.

With this solution the only way to hide dependencies again is to close and reopen the snippet.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Code quality improvements

How to test

1. Ensure correct lines are highlighted when using env visualiser with and without code folding.
2. Ensure snippets with dependencies are hidden correctly and can be revealed by pressing the yellow button. The env viz should also work correctly when dependencies are hidden.

Checklist

• I have tested this code
• I have updated the documentation

[coveralls]

Pull Request Test Coverage Report for Build 974181707

• 0 of 6 (0.0%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.03%) to 30.031%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/pages/playground/Playground.tsx	0	6	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/pages/playground/Playground.tsx	1	1.78%
src/pages/sicp/subcomponents/SicpWorkspaceContainer.tsx	1	11.76%

Totals
Change from base Build 974170028:	-0.03%
Covered Lines:	3199
Relevant Lines:	9806

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 975272159

• 0 of 6 (0.0%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.03%) to 30.031%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/pages/playground/Playground.tsx	0	6	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/pages/playground/Playground.tsx	1	1.78%
src/pages/sicp/subcomponents/SicpWorkspaceContainer.tsx	1	11.76%

Totals
Change from base Build 974255973:	-0.03%
Covered Lines:	3199
Relevant Lines:	9806

---

💛 - Coveralls

[martin-henz]

Works fine.

[coveralls]

Pull Request Test Coverage Report for Build 975272159

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 6 (0.0%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.03%) to 30.031%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/pages/playground/Playground.tsx	0	6	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/pages/playground/Playground.tsx	1	1.78%
src/pages/sicp/subcomponents/SicpWorkspaceContainer.tsx	1	11.76%

Totals
Change from base Build 974255973:	-0.03%
Covered Lines:	3199
Relevant Lines:	9806

---

💛 - Coveralls