Off-by-one fixes & other small changes: website playground, dist charts

[berekuk]

• move /playground by 1px
• move legend by 2px (fixes Multiple-distribution chart is cut off on top. #2834)
• change the dist legend -> chart height logic (discussed here: https://discord.com/channels/1130609991993274510/1133551706370752582/1192201085834760353)
• fix "Not Normalized" badge on dist previews

[changeset-bot]

🦋 Changeset detected

Latest commit: 6ff78cd

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

Name	Type
@quri/squiggle-components	Patch
@quri/versioned-squiggle-components	Patch
vscode-squiggle	Patch
@quri/squiggle-lang	Patch
@quri/prettier-plugin-squiggle	Patch
@quri/squiggle-textmate-grammar	Patch

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Name	Status	Preview	Updated (UTC)
squiggle-website	✅ Ready (Inspect)	Visit Preview	Jan 3, 2024 9:08pm

3 Ignored Deployments

Name	Status	Preview	Updated (UTC)
quri-hub	⬜️ Ignored (Inspect)	Visit Preview	Jan 3, 2024 9:08pm
quri-ui	⬜️ Ignored (Inspect)	Visit Preview	Jan 3, 2024 9:08pm
squiggle-components	⬜️ Ignored (Inspect)	Visit Preview	Jan 3, 2024 9:08pm

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[OAGr]

Code looks fine to me