feat: Enable exercises in articles/courses/... & make UuidContext provide entity type

[LarsTheGlidingSquirrel]

Changes:

• Exercises are enabled in articles, courses, ...
• UuidContext provides entity type ('Article', 'TaxonomyTerm', ...) alongside entity id and revision id. If you are on a page rendering multiple entities (with unique uuids) the context provides different values depending on from where you access it.
• SolutionSerloStaticRenderer shows comment section only if the exercise has a Serlo uuid. Examples: Show on entity type 'Exercise', not show on entity type 'Article'. Uses entity type to figure that out.
• Before: UuidContext was used to provide IDs of groupedExercise (no longer an entity) or fake IDs for exercise analytics. Both are no valid uuids that you can query. After: UuidContext is now only providing valid uuids you can query. ExerciseIdContext provides the exercise ID used for exercise analytics.

Followups:

• Remove exerciseVisibleInSuggestion from editor API (no need to customize that any more)

Potential followups:

• exerciseSubmission is also used for tracking "spoiler opened" events which has nothing to do with exercises. Could be renamed.
• Move AnchorLinkCopyTool out of @serlo/editor and inject it into toolbar only on serlo.org. Come up with editor api changes.
• Rename entityId to serloEntityId and document in code that this is the id in the uuid query.
• Rename UuidContext to SerloContext
• Provide the entity type also in the editor (and other pages)
• Remove serloContext from exercise props and use context instead?

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Name	Status	Preview	Updated (UTC)
frontend	✅ Ready (Inspect)	Visit Preview	May 7, 2024 8:05am

[github-actions[bot]]

📦 Next.js Bundle Analysis for @serlo/frontend

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

Sixty-seven Pages Changed Size

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

Page	Size (compressed)	First Load
/	84.95 KB (🟡 +30 B)	188.7 KB
/404	38.04 KB (🟡 +30 B)	141.79 KB
/500	38.04 KB (🟡 +30 B)	141.79 KB
/[...slug]	83.04 KB (🟡 +123 B)	186.8 KB
/___bot_or_not	95.82 KB (🟡 +30 B)	199.58 KB
/___cf_not_found	36.74 KB (🟡 +30 B)	140.5 KB
/___design	142.08 KB (🟡 +30 B)	245.84 KB
/___editor_preview	483.11 KB (🟡 +38 B)	586.86 KB
/___old_comments	99.75 KB (🟡 +34 B)	203.51 KB
/auth/error	60.26 KB (🟡 +30 B)	164.02 KB
/auth/login	85.43 KB (🟡 +30 B)	189.19 KB
/auth/logout	78.8 KB (🟡 +30 B)	182.56 KB
/auth/oauth/consent	54.53 KB (🟡 +30 B)	158.29 KB
/auth/oauth/login	85.43 KB (🟡 +30 B)	189.19 KB
/auth/oauth/logout	78.81 KB (🟡 +30 B)	182.56 KB
/auth/recovery	66.97 KB (🟡 +30 B)	170.73 KB
/auth/registration	67.89 KB (🟡 +30 B)	171.65 KB
/auth/settings	67.99 KB (🟡 +30 B)	171.75 KB
/auth/verification	67.31 KB (🟡 +30 B)	171.07 KB
/authorization/roles	66.32 KB (🟡 +30 B)	170.07 KB
/backend	38.8 KB (🟡 +30 B)	142.56 KB
/biologie	157.82 KB (🟡 +30 B)	261.58 KB
/chemie	157.82 KB (🟡 +30 B)	261.58 KB
/consent	37.29 KB (🟡 +30 B)	141.05 KB
/content-only/[...slug]	74.55 KB (🟡 +146 B)	178.31 KB
/discussions	96.01 KB (🟡 +34 B)	199.77 KB
/editor	104.14 KB (🟡 +33 B)	207.9 KB
/entity/create/[type]/[taxonomyId]	484.08 KB (🟡 +38 B)	587.84 KB
/entity/license/update/[id]	56.46 KB (🟡 +30 B)	160.22 KB
/entity/link/order/[id]/link	89.73 KB (🟡 +30 B)	193.49 KB
/entity/repository/add-revision/[...id]	483.33 KB (🟡 +39 B)	587.08 KB
/entity/repository/compare/[entity_id]/[revision_id]	85.94 KB (🟡 +30 B)	189.7 KB
/entity/repository/history/[id]	69.69 KB (🟡 +30 B)	173.44 KB
/entity/taxonomy/update/[id]	69.07 KB (🟡 +30 B)	172.82 KB
/entity/unrevised	43.58 KB (🟡 +30 B)	147.33 KB
/event/history	131.06 KB (🟡 +30 B)	234.82 KB
/event/history/[...slug]	132.03 KB (🟡 +30 B)	235.79 KB
/event/history/user/profile/[username]	134.42 KB (🟡 +30 B)	238.17 KB
/gleichungs-app	163.05 KB (🟡 +30 B)	266.81 KB
/informatik	157.83 KB (🟡 +30 B)	261.58 KB
/jobs/[[...jobId]]	50.81 KB (🟡 +30 B)	154.57 KB
/legal	36.77 KB (🟡 +30 B)	140.53 KB
/lerntipps	157.82 KB (🟡 +30 B)	261.58 KB
/license/detail/[id]	58.01 KB (🟡 +30 B)	161.77 KB
/mathe	157.82 KB (🟡 +30 B)	261.58 KB
/mathe-aufgaben	37.47 KB (🟡 +30 B)	141.23 KB
/mathe-pruefungen/[region]	76.21 KB (🟡 +30 B)	179.97 KB
/metadata	46.42 KB (🟡 +30 B)	150.18 KB
/nachhaltigkeit	157.83 KB (🟡 +30 B)	261.59 KB
/page/create	483.33 KB (🟡 +40 B)	587.09 KB
/pages	57.79 KB (🟡 +30 B)	161.54 KB
/privacy	40.11 KB (🟡 +30 B)	143.87 KB
/search	41.08 KB (🟡 +30 B)	144.84 KB
/spenden	51.7 KB (🟡 +30 B)	155.46 KB
/subscriptions/manage	113.78 KB (🟡 +30 B)	217.54 KB
/taxonomy/term/[copyOrMove]/batch/[id]	71.65 KB (🟡 +30 B)	175.4 KB
/taxonomy/term/create/[parent_id]/[id]	483.1 KB (🟡 +39 B)	586.86 KB
/taxonomy/term/sort/entities/[id]	93.59 KB (🟡 +30 B)	197.35 KB
/taxonomy/term/update/[id]	483.05 KB (🟡 +39 B)	586.81 KB
/terms	36.79 KB (🟡 +30 B)	140.55 KB
/user/[...userslug]	36.57 KB (🟡 +30 B)	140.33 KB
/user/me	36.56 KB (🟡 +30 B)	140.32 KB
/user/notifications	133.29 KB (🟡 +30 B)	237.04 KB
/user/profile/[username]	176.57 KB (🟡 +30 B)	280.33 KB
/user/settings	482 KB (🟡 +37 B)	585.76 KB
/uuid/recycle-bin	86.06 KB (🟡 +30 B)	189.82 KB
/wallet	41.72 KB (🟡 +30 B)	145.48 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.