fix(cli): pass fallbackFile and VCS fields through push sites

[ChiragAgg5k]

Summary

appwrite push sites drops fallbackFile and git/VCS fields from create/update payloads, so values in appwrite.config.json are ignored even though sites create / sites update already accept them.

This updates the CLI templates so generated sdk-for-cli:

• Passes fallbackFile, installationId, providerRepositoryId, providerBranch, providerSilentMode, and providerRootDirectory on both create and update in pushSites
• Allows the VCS fields in the strict site config schema
• Includes them when pulling sites so config round-trips

Originally reported in appwrite/sdk-for-cli#344. A direct fix to sdk-for-cli (#345) was closed in favor of landing this in sdk-generator.

Test plan

• Regenerate the CLI SDK from these templates
• Set fallbackFile: "index.html" on a site in appwrite.config.json
• Run appwrite push sites --site-id <id> --force
• Run appwrite sites get --site-id <id> and confirm fallbackFile is set
• Optionally set installationId / providerRepositoryId / providerBranch / providerRootDirectory / providerSilentMode and confirm they are applied on push
• appwrite pull sites writes those fields back into the config

[greptile-apps]

Greptile Summary

This PR restores site configuration round-tripping in the generated CLI.

• Allows the five VCS properties in the strict site configuration schema.
• Copies fallback and VCS properties into pulled site configurations.
• Passes fallback and VCS properties through both create and update push payloads.

Confidence Score: 5/5

The PR appears safe to merge, with the new fields consistently represented across configuration validation, pull, and both push paths.

The changes propagate matching optional site properties through the complete config round-trip without introducing a concrete build, runtime, data-integrity, or security failure.

Important Files Changed

Filename	Overview
templates/cli/lib/commands/config.ts	Extends the strict site schema with optional VCS fields whose names and types align with the new pull and push mappings.
templates/cli/lib/commands/pull.ts	Preserves VCS properties from site responses when writing site configuration, completing the pull side of round-tripping.
templates/cli/lib/commands/push.ts	Adds fallback and VCS properties symmetrically to site creation and update payloads; no concrete regression was identified.

_{Reviews (1): Last reviewed commit: "fix(cli): pass fallbackFile and VCS fiel..." | Re-trigger Greptile}