feat: migrate apps:link to git connections

[robingenz]

This PR migrates the apps:link command from the legacy repository-linking flow to the new git-connection-based flow.

• Link repositories via PUT /v1/apps/:appId/repository with { gitConnectionId, path } instead of the legacy slug body.
• Resolve the local git remote server-side via the new resolve endpoint — all provider/host parsing logic removed from the CLI.
• New options: --git-connection-id, --git-connection (name lookup), and --path for non-interactive/CI usage.
• Interactive flow: confirm the single resolved candidate, pick from multiple candidates, or fall back to a connection picker with repository browsing (Bitbucket workspace, Azure DevOps organization/project, and Git HTTP/S clone URL prompts).
• Git connections are org-scoped with a server-controlled restricted flag; restricted connections are excluded from selection.
• New git-connections service and types; AppDto now includes organizationId.

[Copilot]

Pull request overview

Migrates apps:link from the legacy “parse local git remote + slug payload” flow to the new org-scoped git-connection flow, relying on server-side remote resolution and enabling non-interactive usage via explicit git-connection and repository path options.

Changes:

• Reworks apps:link to link via { gitConnectionId, path }, adds --git-connection-id, --git-connection, and --path, and introduces server-side remote resolution.
• Introduces git-connection DTOs plus a git-connections service for listing, resolving, and browsing repositories.
• Simplifies git utilities by removing provider/host parsing and deleting the associated tests.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/utils/prompt.ts	Adds interactive selection helpers for git connections and repositories.
src/utils/git.ts	Replaces remote parsing logic with a lightweight getGitRemoteUrl() helper.
src/utils/git.test.ts	Removes tests for the deleted remote parsing implementation.
src/types/git-connection.ts	Adds DTOs for git connections, resolution results, and repository browsing.
src/types/app.ts	Updates app/repository-link DTOs to support git-connection linking and adds organizationId to AppDto.
src/services/git-connections.ts	New service for listing git connections, resolving remote URLs, and listing repositories.
src/commands/apps/link.ts	Migrates command logic to git connections, adds non-interactive flags, and implements interactive resolution/selection flows.
src/commands/apps/link.test.ts	Updates tests to cover new options, resolution flow, and selection fallbacks.

Comments suppressed due to low confidence (1)

src/commands/apps/link.ts:103

• Resolved git-connection candidates from the resolve endpoint are used directly in the interactive flow; if the server returns any restricted connections, they can appear in the selection/auto-confirm path. Filter out restricted connections before prompting/auto-selecting to ensure restricted connections are never selectable.

        const gitConnections = resolution.gitConnections;
        const gitConnection = gitConnections[0];
        if (gitConnections.length === 1 && gitConnection) {

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