feat: Command Line SDK update for version 19.2.0

[ChiragAgg5k]

This PR contains updates to the Command Line SDK for version 19.2.0.

[greptile-apps]

Greptile Summary

This PR bumps the CLI to v19.2.0, shipping three main changes: a new completion command with zsh/bash/fish support, an improved Homebrew update path that auto-detects the installed formula (including third-party taps), and a fix to the standalone update-check URL (now correctly pointing at appwrite/sdk-for-cli). All three features are well-structured with appropriate fallback/degradation paths.

Confidence Score: 5/5

Safe to merge; only P2 findings present

No P0 or P1 issues found. The two P2 findings (incomplete global-option handling in isCompletionInvocation and an unquoted shell variable) are cosmetic/style concerns that don't affect correctness of the shipped features.

lib/completions.ts — the findTopLevelCommandArg edge case around space-separated global option values is worth a follow-up

Important Files Changed

Filename	Overview
lib/completions.ts	New file implementing shell completion for zsh, bash, and fish; findTopLevelCommandArg doesn't account for all space-consuming global options, causing isCompletionInvocation() to misfire in edge cases
lib/commands/update.ts	Refactored to detect the installed Homebrew formula and use it for upgrade/version-check, with a recommendation hint when a non-official tap is detected; logic is sound
lib/utils.ts	Added getInstalledHomebrewFormula via brew list --formula --full-name, with priority logic for official tap then tap-match fallback; handles third-party taps correctly
cli.ts	Wires up completion command, skips update-notice and migrate() hook for completion invocations; migrate signature confirmed to take no args so the refactor is correct
install.sh	Adds installCompletions step (step 4/5) with graceful degradation on failure; unquoted $APPWRITE_EXECUTABLE_FILEPATH is a minor style concern
lib/constants.ts	Version bump to 19.2.0 and corrects GITHUB_REPO from legacy appwrite/appwrite-cli to appwrite/sdk-for-cli
install.ps1	Version bump of download URLs from 19.1.0 to 19.2.0; straightforward change
scoop/appwrite.config.json	Version and download URLs bumped to 19.2.0; no hashes present (consistent with prior version)

_{Reviews (2): Last reviewed commit: "chore: update Command Line SDK to 19.2.0" | Re-trigger Greptile}