Add Python and JavaScript emitters to benchmark testing (#4525)

The benchmark engine was missing the Python and JavaScript emitters, so
their SDK generation performance was not being tracked.

## Changes

- **`packages/benchmark/package.json`** — added
`@azure-tools/typespec-python` and `@typespec/http-client-js` as
workspace dependencies
- **`specs/azure-arm-resource-manager/tspconfig.yaml`** — added Python
and JavaScript emitters
- **`specs/azure-core-dataplane/tspconfig.yaml`** — added Python emitter
with `package-mode: dataplane` and JavaScript emitter
- **`specs/azure-full/tspconfig.yaml`** — added Python emitter with
`package-mode: dataplane` and JavaScript emitter

Example config for the ARM spec:
```yaml
emit:
  - "@azure-tools/typespec-autorest"
  - "@azure-tools/typespec-python"
  - "@typespec/http-client-js"
options:
  "@azure-tools/typespec-python":
    namespace: "azure.mgmt.contosobenchmark"
```

Emit timing for both emitters will now appear in benchmark comparisons
under `emit/@azure-tools/typespec-python` and
`emit/@typespec/http-client-js`.

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: timotheeguerin <1031227+timotheeguerin@users.noreply.github.com>

Author: Copilot

cspell.yaml

@@ -39,6 +39,7 @@ words:
   - byos
   - chartjs
   - clsx
+  - contosobenchmark
   - contosowidgetmanager
   - Chenjie
   - DMSS

packages/benchmark/package.json

@@ -31,7 +31,9 @@
     "@azure-tools/typespec-azure-resource-manager": "workspace:^",
     "@azure-tools/typespec-azure-rulesets": "workspace:^",
     "@azure-tools/typespec-autorest": "workspace:^",
-    "@azure-tools/typespec-client-generator-core": "workspace:^"
+    "@azure-tools/typespec-client-generator-core": "workspace:^",
+    "@azure-tools/typespec-python": "workspace:^",
+    "@typespec/http-client-js": "workspace:^"
   },
   "devDependencies": {
     "@types/node": "catalog:",

packages/benchmark/specs/azure-arm-resource-manager/tspconfig.yaml

@@ -1,9 +1,13 @@
 emit:
   - "@azure-tools/typespec-autorest"
+  - "@azure-tools/typespec-python"
+  - "@typespec/http-client-js"
 options:
   "@azure-tools/typespec-autorest":
     use-read-only-status-schema: true
     output-file: "{emitter-output-dir}/{service-name}/{version}/openapi.json"
+  "@azure-tools/typespec-python":
+    namespace: "azure.mgmt.contosobenchmark"
 linter:
   extends:
     - "@azure-tools/typespec-azure-rulesets/resource-manager"

packages/benchmark/specs/azure-core-dataplane/tspconfig.yaml

@@ -1,9 +1,14 @@
 emit:
   - "@azure-tools/typespec-autorest"
   - "@typespec/openapi3"
+  - "@azure-tools/typespec-python"
+  - "@typespec/http-client-js"
 options:
   "@azure-tools/typespec-autorest":
     output-file: "{emitter-output-dir}/{service-name}/{version}/openapi.json"
+  "@azure-tools/typespec-python":
+    namespace: "contoso.benchmarkwidgets"
+    package-mode: dataplane
 linter:
   extends:
     - "@azure-tools/typespec-azure-rulesets/data-plane"

packages/benchmark/specs/azure-full/tspconfig.yaml

@@ -1,10 +1,15 @@
 emit:
   - "@azure-tools/typespec-autorest"
   - "@typespec/openapi3"
+  - "@azure-tools/typespec-python"
+  - "@typespec/http-client-js"
 options:
   "@azure-tools/typespec-autorest":
     use-read-only-status-schema: true
     output-file: "{emitter-output-dir}/{service-name}/{version}/openapi.json"
+  "@azure-tools/typespec-python":
+    namespace: "contoso.benchmarkfull"
+    package-mode: dataplane
 linter:
   extends:
     - "@azure-tools/typespec-azure-rulesets/data-plane"