feat: enable exercises plugin in some content types, refactor serlo exercise Id code

[elbotho]

inspired by https://github.com/serlo/frontend/pull/3754 with a little bit different approach

Exercise Plugin in Editor Plugin suggestions

• Exercises are enabled in articles, courses, preview pages, etc …

Context

• ExerciseGroupIdContext is now ExerciseIdsContext and additionally provides:
  • exerciseEntityId (if the exercise is actually a standalone serlo entity)
  • exerciseTrackingId (for the constructed Id that is only used for evaluation)

I hope this way we can avoid confusion here

Comments The comments inside solutions is now only shown on exercises (not exerciseGroups) that are actually entites. Otherwise we always show a link:

• for injected exerciseGroups (entites): link to the comment section of the standalone view of the exercise (new tab)
• for exercises/groups in the content of an article/coursePage: scroll to comment section of current page

Follow ups from https://github.com/serlo/frontend/pull/3754 still make sense.

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Name	Status	Preview	Updated (UTC)
frontend	✅ Ready (Inspect)	Visit Preview	May 10, 2024 0:46am

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📦 Next.js Bundle Analysis for @serlo/frontend

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

🎉 Global Bundle Size Decreased

Page	Size (compressed)
global	103.75 KB (🟢 -11 B)

Details

The global bundle is the javascript bundle that loads alongside every page. It is in its own category because its impact is much higher - an increase to its size means that every page on your website loads slower, and a decrease means every page loads faster.

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

If you want further insight into what is behind the changes, give @next/bundle-analyzer a try!

Sixty-two Pages Changed Size

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

Page	Size (compressed)	First Load
/	84.92 KB (🟡 +3 B)	188.67 KB
/404	38.01 KB (🟡 +3 B)	141.76 KB
/500	38.01 KB (🟡 +3 B)	141.76 KB
/[...slug]	82.95 KB (🟡 +29 B)	186.7 KB
/___bot_or_not	95.81 KB (🟡 +22 B)	199.56 KB
/___cf_not_found	36.72 KB (🟡 +3 B)	140.46 KB
/___design	142.06 KB (🟡 +3 B)	245.8 KB
/___editor_preview	482.9 KB (🟡 +111 B)	586.65 KB
/___old_comments	99.65 KB (🟢 -71 B)	203.4 KB
/auth/error	60.23 KB (🟡 +3 B)	163.98 KB
/auth/login	85.4 KB (🟡 +3 B)	189.15 KB
/auth/logout	78.77 KB (🟡 +3 B)	182.52 KB
/auth/oauth/consent	54.5 KB (🟡 +3 B)	158.25 KB
/auth/oauth/login	85.41 KB (🟡 +3 B)	189.15 KB
/auth/oauth/logout	78.78 KB (🟡 +3 B)	182.53 KB
/auth/recovery	66.95 KB (🟡 +3 B)	170.69 KB
/auth/registration	67.87 KB (🟡 +3 B)	171.62 KB
/auth/settings	67.96 KB (🟡 +3 B)	171.71 KB
/auth/verification	67.29 KB (🟡 +3 B)	171.03 KB
/authorization/roles	66.28 KB (-3 B)	170.03 KB
/backend	38.77 KB (🟡 +3 B)	142.52 KB
/biologie	157.83 KB (🟡 +31 B)	261.57 KB
/chemie	157.82 KB (🟡 +31 B)	261.57 KB
/consent	37.27 KB (🟡 +3 B)	141.01 KB
/content-only/[...slug]	74.44 KB (🟡 +30 B)	178.19 KB
/discussions	96.15 KB (🟡 +177 B)	199.9 KB
/editor	104.14 KB (🟡 +27 B)	207.88 KB
/entity/create/[type]/[taxonomyId]	483.86 KB (🟡 +111 B)	587.61 KB
/entity/license/update/[id]	56.44 KB (🟡 +3 B)	160.19 KB
/entity/link/order/[id]/link	89.71 KB (🟡 +3 B)	193.45 KB
/entity/repository/add-revision/[...id]	483.14 KB (🟡 +117 B)	586.89 KB
/entity/repository/compare/[entity_id]/[revision_id]	85.94 KB (🟡 +28 B)	189.68 KB
/entity/repository/history/[id]	69.65 KB (-4 B)	173.4 KB
/entity/taxonomy/update/[id]	69.03 KB (-4 B)	172.78 KB
/entity/unrevised	43.55 KB (🟡 +3 B)	147.3 KB
/gleichungs-app	163.03 KB (🟡 +3 B)	266.78 KB
/informatik	157.83 KB (🟡 +31 B)	261.57 KB
/jobs/[[...jobId]]	50.79 KB (🟡 +4 B)	154.53 KB
/legal	36.74 KB (🟡 +3 B)	140.49 KB
/lerntipps	157.82 KB (🟡 +31 B)	261.57 KB
/license/detail/[id]	58.01 KB (🟡 +27 B)	161.75 KB
/mathe	157.82 KB (🟡 +31 B)	261.57 KB
/mathe-aufgaben	37.45 KB (🟡 +3 B)	141.19 KB
/mathe-pruefungen/[region]	76.18 KB (🟡 +3 B)	179.93 KB
/metadata	46.39 KB (🟡 +3 B)	150.14 KB
/nachhaltigkeit	157.83 KB (🟡 +31 B)	261.58 KB
/page/create	483.15 KB (🟡 +113 B)	586.89 KB
/pages	57.76 KB (🟡 +3 B)	161.51 KB
/privacy	40.08 KB (🟡 +3 B)	143.83 KB
/search	41.06 KB (🟡 +3 B)	144.8 KB
/spenden	51.68 KB (🟡 +3 B)	155.42 KB
/taxonomy/term/[copyOrMove]/batch/[id]	71.61 KB (-4 B)	175.36 KB
/taxonomy/term/create/[parent_id]/[id]	482.92 KB (🟡 +118 B)	586.67 KB
/taxonomy/term/sort/entities/[id]	93.57 KB (🟡 +3 B)	197.31 KB
/taxonomy/term/update/[id]	482.86 KB (🟡 +119 B)	586.61 KB
/terms	36.76 KB (🟡 +3 B)	140.51 KB
/user/[...userslug]	36.54 KB (🟡 +3 B)	140.29 KB
/user/me	36.53 KB (🟡 +3 B)	140.28 KB
/user/profile/[username]	176.57 KB (🟡 +24 B)	280.31 KB
/user/settings	481.82 KB (🟡 +108 B)	585.57 KB
/uuid/recycle-bin	86.03 KB (-3 B)	189.77 KB
/wallet	41.7 KB (🟡 +3 B)	145.45 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.