docs: rename Evaluate to Evals; inline naming conventions into CLAUDE.md (cube-js#11147)

* docs: rename Evaluate/Evaluations UI labels to Evals

Match the renamed product UI: the model IDE tab and the runs sub-tab are
now "Evals", a single run is an "eval run", and the action/column read
"New eval"/"Eval name". Updates the section heading and image alt text to
match.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* docs: add Evals to product taxonomy and naming conventions

Record Evals under the Agent node in the product taxonomy tree and add an
Evals Terminology section establishing "Evals" (feature/tab/sub-tab) and
"eval run" as canonical, with "Evaluate"/"Evaluation" called out as legacy.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* docs: inline naming conventions into CLAUDE.md, drop Cursor rule

We no longer use Cursor, so move the product naming conventions out of
.cursor/rules/namings-rule.mdc and inline them directly into
docs-mintlify/CLAUDE.md (headings demoted to nest under "Naming
conventions"). Removes the @-import and the orphaned Cursor file.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* docs: correct eval action label to "Run eval"

The button is labeled "Run eval", not "New eval". Fix the evals page and
the Evals Terminology naming note.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* docs: rename eval-run column label to "Eval run"

The runs-list column is labeled "Eval run", not "Eval name". Fix the
evals page and the Evals Terminology naming note.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: keydunov