MRT commands: push, env-var management

[clavery]

Summary

• MRT Push command (mrt push): Push bundles to Managed Runtime with optional deployment to an environment

  • Renamed --target flag to --environment for consistency with other commands
  • Added --ssr-param flag for custom SSR parameters
  • Updated default SSR patterns: ssr-only: ssr.js,server/**/*, ssr-shared: static/**/*,client/**/*

• MRT Environment Variable commands (mrt env-var):

  • list: List environment variables for a project/environment with table output
  • set: Set one or more environment variables using KEY=value syntax
  • delete: Delete an environment variable

• MRT API key authentication: Load API key from ~/.mobify config file as fallback (after --api-key flag and SFCC_MRT_API_KEY env var)

• Shared TableRenderer utility: Extracted common table rendering logic into reusable TableRenderer class in @salesforce/b2c-tooling/cli

• Bug fix: Fixed site archive import sending empty body to job execution endpoint

• Documentation: Updated TypeDoc entry points to include new modules (cli, config, operations/mrt)