WIP: External API for migration extensions

[tnaum-ms]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces an external API for migration extensions, expanding support for migration providers and integrating them into the DocumentDB extension. Key changes include:

• Creation of migration service implementations and API contracts for migration providers.
• Integration of a new “choose migration” command in the DocumentDB extension.
• Addition of API packaging, workflows, and localization updates to support migration features.

Reviewed Changes

Copilot reviewed 22 out of 22 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/services/migrationServices.ts	Implements migration provider interfaces and a service singleton for provider registration and listing.
src/extension.ts	Updates the extension activation to expose a union API including migration features.
src/documentdb/ClustersExtension.ts	Registers the new command for choosing a migration extension.
src/commands/chooseDataMigrationExtension/chooseDataMigrationExtension.ts	Implements the command UI and logic to select and execute migration provider actions.
package.json, l10n/bundle.l10n.json	Adds new commands and localized strings for migration support.
api folder	Introduces API definitions, build configuration, and workflows for the migration extension API.

Comments suppressed due to low confidence (3)

src/extension.ts:32

• The union return type for activateInternal may lead to ambiguity for API consumers; consider consolidating the API or clearly documenting the expected handling for each type.

): Promise<apiUtils.AzureExtensionApiProvider | DocumentDBExtensionApi> {

src/commands/chooseDataMigrationExtension/chooseDataMigrationExtension.ts:118

• Using a generic id like 'separator' may conflict if an actual provider uses this id; consider using a reserved prefix (for example, 'separator') to avoid potential conflicts.

{ id: 'separator', label: '', kind: QuickPickItemKind.Separator }

src/commands/chooseDataMigrationExtension/chooseDataMigrationExtension.ts:175

• The ensureAuthentication function currently returns false as a placeholder; consider adding tests or implementing the authentication flow to ensure proper coverage of migration provider actions that require authentication.

async function ensureAuthentication(_context: IActionContext, _node: ClusterItemBase): Promise<boolean> { ... }

[tnaum-ms]

no longer tracking this PR, a new repo structure will be setup for features.