feat(editor): add ai experiments

[elbotho]

moving the experiments from #4064 over into the editor so we can test them also in integrations.
not meant for production.
i try to keep a clear separation between the experiments and the rest of the editor if possible.

status:

• change and generate: improvements needed
• autocomplete: not started

Demo

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Name	Status	Preview	Updated (UTC)
frontend	✅ Ready (Inspect)	Visit Preview	Feb 3, 2025 4:12pm

[github-actions]

📦 Next.js Bundle Analysis for @serlo/frontend

This analysis was generated by the Next.js Bundle Analysis action. 🤖

Twenty-five Pages Changed Size

The following pages changed size from the code in this PR compared to its base branch:

Page	Size (compressed)	First Load
/[...slug]	106.5 KB (🟡 +508 B)	211.89 KB
/___bot_or_not	114.66 KB (🟡 +507 B)	220.05 KB
/___editor_preview	203.76 KB (🟡 +2.46 KB)	309.15 KB
/___old_comments	97.39 KB (-3 B)	202.78 KB
/biologie	175.25 KB (🟡 +508 B)	280.63 KB
/chemie	175.25 KB (🟡 +506 B)	280.63 KB
/content-only/[...slug]	95.49 KB (🟡 +507 B)	200.87 KB
/discussions	93.93 KB (-3 B)	199.32 KB
/editor	58.22 KB (🟡 +8 B)	163.61 KB
/entity/create/[type]/[taxonomyId]	225.46 KB (🟡 +2.47 KB)	330.84 KB
/entity/repository/add-revision/[...id]	225.12 KB (🟡 +2.47 KB)	330.51 KB
/entity/repository/compare/[entity_id]/[revision_id]	111.46 KB (🟡 +508 B)	216.84 KB
/gleichungs-app	162.19 KB (-3 B)	267.57 KB
/informatik	175.25 KB (🟡 +507 B)	280.63 KB
/lerntipps	175.25 KB (🟡 +508 B)	280.63 KB
/license/detail/[id]	82.65 KB (🟡 +508 B)	188.03 KB
/mathe	175.25 KB (🟡 +508 B)	280.63 KB
/nachhaltigkeit	175.26 KB (🟡 +507 B)	280.64 KB
/page/create	225.12 KB (🟡 +2.47 KB)	330.51 KB
/taxonomy/term/[copyOrMove]/batch/[id]	70.24 KB (🟡 +71 B)	175.62 KB
/taxonomy/term/create/[parent_id]/[id]	224.83 KB (🟡 +2.47 KB)	330.21 KB
/taxonomy/term/sort/entities/[id]	90.1 KB (🟡 +71 B)	195.48 KB
/taxonomy/term/update/[id]	224.75 KB (🟡 +2.47 KB)	330.13 KB
/user/profile/[username]	193.74 KB (🟡 +510 B)	299.12 KB
/user/settings	226.91 KB (🟡 +2.47 KB)	332.29 KB

Details

Only the gzipped size is provided here based on an expert tip.

First Load is the size of the global bundle plus the bundle for the individual page. If a user were to show up to your website and land on a given page, the first load size represents the amount of javascript that user would need to download. If next/link is used, subsequent page loads would only need to download that page's bundle (the number in the "Size" column), since the global bundle has already been downloaded.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

Next to the size is how much the size has increased or decreased compared with the base branch of this PR. If this percentage has increased by 20% or more, there will be a red status indicator applied, indicating that special attention should be given to this.