Merge branch 'selhorn-move-eval-runner' into 'master'

Moving eval runner docs

See merge request !179907



Merged-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: David O'Regan <doregan@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Reviewed-by: Shinya Maeda <shinya@gitlab.com>
Reviewed-by: Manoj M J <mmj@gitlab.com>
Co-authored-by: Suzanne Selhorn <sselhorn@gitlab.com>

doc/development/ai_features/evaluation_runner/_index.md

+---
+stage: AI-powered
+group: AI Framework
+info: Any user with at least the Maintainer role can merge updates to this content. For details, see https://docs.gitlab.com/ee/development/development_processes.html#development-guidelines-review.
+title: Evaluation runner
+---
+
+Evaluation runner (`evaluation-runner`) allows GitLab employees to run evaluations on specific GitLab AI features with one click.
+
+- You can run the evaluation on GitLab.com and GitLab-supported self-hosted models.
+- To view the AI features that are currently supported, see
+  [Evaluation pipelines](https://gitlab.com/gitlab-org/modelops/ai-model-validation-and-research/ai-evaluation/evaluation-runner#evaluation-pipelines).
+
+Evaluation runner spins up a new GDK instance on a remote environment, runs an evaluation, and reports the result.
+
+For more details, view the
+[`evaluation-runner` repository](https://gitlab.com/gitlab-org/modelops/ai-model-validation-and-research/ai-evaluation/evaluation-runner).
+
+## Architecture
+
+```mermaid
+flowchart LR
+  subgraph EV["Evaluators"]
+    PL(["PromptLibrary/ELI5"])
+    DSIN(["Input Dataset"])
+  end
+
+  subgraph ER["EvaluationRunner"]
+    CI["CI/CD pipelines"]
+    subgraph GDKS["Remote GDKs"]
+        subgraph GDKM["GDK-master"]
+          bl1["Duo features on master branch"]
+          fi1["fixtures (Issue,MR,etc)"]
+        end
+        subgraph GDKF["GDK-feature"]
+          bl2["Duo features on feature branch"]
+          fi2["fixtures (Issue,MR,etc)"]
+        end
+    end
+  end
+
+  subgraph MR["MergeRequests"]
+    GRMR["GitLab-Rails MR"]
+    GRAI["AI Gateway MR"]
+  end
+
+  MR -- [1] trigger --- CI
+  CI -- [2] spins up --- GDKS
+  PL -- [3] get responses and evaluate --- GDKS
+```