Implement Spector integration tests for encode/array

[Copilot]

Adds Azure Modular integration test coverage for the encode/array Spector scenarios, which test JSON body serialization of arrays using various delimiters (commaDelimited, spaceDelimited, pipeDelimited, newlineDelimited) across string, enum, and extensible enum array property types.

Changes

• test/commands/cadl-ranch-list.js — Added encode/array entry to azureModularTsps
• test/azureModularIntegration/generated/encode/array/ — Added tspconfig.yaml, .gitignore, and generated src/index.d.ts for the ArrayClient
• test/azureModularIntegration/encodeArray.spec.ts — 12 test cases covering all mockapi scenarios via client.property.<delimiter>Delimited() operations

Example

// Each scenario POSTs an array and expects the same array back
// (serialized/deserialized via the delimiter encoding)
const result = await client.property.commaDelimited({ value: ["blue", "red", "green"] });
assert.deepEqual(result.value, ["blue", "red", "green"]);
// Wire: { "value": "blue,red,green" }

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.
fixes #3700

[v-jiaodi]

@copilot revert package.json and pnpm-lock.yaml change.

[Copilot]

@copilot revert package.json and pnpm-lock.yaml change.

Done. Reverted packages/typespec-ts/package.json and pnpm-lock.yaml to their original state in commit 0c4b31f.

[v-jiaodi]

LGTM