Sort JSDoc @param completions by argument position

[Vi-Ku]

Fixes #20183

Problem

When writing JSDoc @param tags, the completions for parameter names are sorted alphabetically instead of by their position in the function signature.

For example, given:

/**
 * @param |
 */
function foo(z, a) {}

Triggering completions at | returns a before z, because both entries have the same sortText value ("11" / LocationPriority), causing the editor to fall back to alphabetical sorting.

Fix

Set sortText for each JSDoc @param completion to LocationPriority + parameterIndex (e.g., "110", "111", "112"). This ensures completions appear in the same order as the function's parameter list.

Changes:

• src/services/completions.ts: Updated getJSDocParameterCompletions to use parameter index in sortText for both named and destructuring parameters
• src/services/jsDoc.ts: Updated getJSDocParameterNameCompletions to use parameter index in sortText
• Updated existing tests and baselines to reflect new sortText values
• Added new test jsdocParameterNameSortOrder.ts that explicitly verifies the sort order

[RyanCavanaugh]

This repo is closed except for critical bugfixes, see

https://github.com/microsoft/TypeScript?tab=readme-ov-file#contribute

https://github.com/microsoft/TypeScript/blob/main/CONTRIBUTING.md#note

https://redirect.github.com/microsoft/TypeScript/issues/62963#issuecomment-4100336368