## Description
A public API exists which can be called by users for limited numbers of calls.
**Acceptance criteria**
[x] A new API is provided, `wikifunctions_run`, and registered appropriately in a new namespace (//e.g.// `namespace MediaWiki\Extension\WikiLambda\PublicAPI;`)
[x] It should be a fork of the existing `wikilambda_function_call` but with some simplifications:
[x] Different, additional rights for this API (so we can throttle it differently)
[x] Drop the low-value '`success`' return
[x] {T349967}
[ ] ~~//Others?//~~
[x] It should be tested, like ApiFunctionCallTest, using the Beta Cluster test rig
[x] A successful test of trivial success (pre-defined, built-in function //e.g.// Z801/Echo)
[ ] A successful test of user-defined on-wiki content, //e.g.// Z10000/Negate
[ ] A successful test of inline user-defined content
[ ] A failed test due to lacking user rights to run at all
[ ] A failed test due to lacking user rights to run an inline-function
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## Completion checklist
Functionality:
[x] The solution meets the expected behavior/acceptance criteria described above
[ ] All the child tasks are closed
[x] The issue has been peer reviewed
[x] The issue has been merged
Engineering:
[ ] There are existing and passing unit/integration tests effectively testing its success and its failure
[ ] All new classes/methods are covered by unit tests
Documentation
[x] All new functions/methods are annotated
[x] Related documentation in MediaWiki extension pages or Abstract Wikipedia pages in meta should be updated with the related changes
[x] E.g. New API being created should be reflected in WikiLambda API help page
Accessibility:
[x] All user facing strings are internationalized