Add the Danish and Bahasa Malaysia wiki pages

Draft ten translations (Home, Onboarding, Credentials, Troubleshooting,
Capabilities in da and ms) with the source hash header from ADR-0001, a
language switcher on every page and a term list. build_wiki.py --check now
reports missing or stale translations, and tests assert that translations
follow the structure of the English page.

The drafts await review by a native reader (MIL-005 task 5).

Task: MIL-005#4

wiki/Capabilities.da.md

@@ -0,0 +1,83 @@
+<!-- translation of Capabilities.md, source sha256 468c912e521b -->
+
+> Dette er en oversættelse af [`Capabilities`](Capabilities). Den engelske side er autoritativ, og ændringer her bliver overskrevet, næste gang wikien publiceres.
+
+[English](Capabilities) | Dansk | [Bahasa Melayu](Capabilities.ms)
+
+## Funktionalitet
+
+Kun den første række er implementeret. Resten er planlagt og følges i [projektplanen](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/docs/project-plan.md), som også beskriver hver enkelt use case.
+
+| Funktionalitet | Status |
+| --- | --- |
+| Synkronisering af repositorymetadata (Gitea til GitHub-spejl) | Implementeret i `.gitea/scoped_workflows/`, med offline-tests og et valideringsworkflow |
+| Konfiguration og validering af workflow-credentials | Implementeret for synkroniseringsworkflowet: en forhåndskontrol tjekker begge tokens før enhver ændring ([vejledning](Credentials.da)) |
+| Tilslutning af et repository, administration af runners, fejlfinding | Vejledninger er skrevet ([tilslutning](Onboarding.da), [fejlfinding](Troubleshooting.da)); scoped levering til andre repositories er ikke verificeret endnu; korte use cases er åbne (MIL-002) |
+| Fælles kvalitetskontrol | Planlagt (MIL-003) |
+| Versioneret udgivelse og publicering | Planlagt (MIL-004) |
+
+### Synkronisering af GitHub-metadata
+
+Synkroniserer Gitea-repositoryets beskrivelse og emner til GitHub push-spejlet.
+
+#### Tidsplan (cron)
+
+Dagligt kl. 03:17 UTC (`17 3 * * *`) samt ved hvert push til `main` og manuel `workflow_dispatch`.
+
+#### Workflow
+
+```plantuml
+@startuml
+title Sync Gitea repository description and topics to GitHub
+
+autonumber
+
+actor "Push to main,\nmanual trigger, or schedule" as Trigger
+participant "Gitea Actions\nsync-github-metadata" as Workflow
+participant "Gitea REST API" as Gitea
+participant "GitHub REST API" as GitHub
+
+Trigger -> Workflow: Start workflow
+activate Workflow
+
+Workflow -> Workflow: Read and validate secrets
+note right
+TOKEN_FOR_GITEA
+CREDENTIALS_FOR_GITHUB
+end note
+
+alt secret validation failed
+  Workflow --> Trigger: workflow failed
+end
+
+
+Workflow -> Gitea: GET /repos/{owner}/{repo}
+Gitea --> Workflow: Description and topics
+
+Workflow -> Gitea: GET /repos/{owner}/{repo}/push_mirrors
+Gitea --> Workflow: Push mirror response
+
+alt mirrors is not a list
+    Workflow --> Trigger: Log a warning and succeed\n(GitHub metadata not synced)
+else mirrors is a list with no GitHub mirror
+    Workflow --> Trigger: Log that there is nothing to sync and succeed
+else mirrors is a list
+    Workflow -> Workflow: Find GitHub owner and repo from remote_address
+
+    Workflow -> GitHub: PATCH /repos/{owner}/{repo}\n{description}
+    GitHub --> Workflow: Repository updated
+
+    Workflow -> GitHub: PUT /repos/{owner}/{repo}/topics\n{names}
+    GitHub --> Workflow: Topics updated
+
+    Workflow --> Trigger: Sync completed
+else Gitea API denies access
+    Gitea --> Workflow: HTTP 403 Forbidden
+    Workflow --> Trigger: Workflow fails
+else GitHub API denies access
+    GitHub --> Workflow: HTTP error
+    Workflow --> Trigger: Workflow fails
+end
+deactivate Workflow
+@enduml
+```