fix: config schema descriptions

[artus9033]

Summary

PR:

• fixes prettier binary missing in some scripts due to missing devDep in cli package
• documents setup of trusted domains for the schema in IDEs
• added missing descriptions to schema options in our code
• [blocker] as feat: added docstring descriptions to option typings callstackincubator/rock#714 is released, we will get descriptions for all schema options

Test plan

[Copilot]

Pull request overview

This PR improves the CLI config schema usability (IDE autocomplete/hover) by adding missing option descriptions, documents how to enable schema downloads in IDEs, and fixes the CLI package’s schema-generation script by adding a missing prettier devDependency.

Changes:

• Add prettier to @callstack/brownfield-cli devDependencies to support generate:schema.
• Add/propagate descriptions for config options in TypeScript types and the generated schema.json.
• Document IDE setup for trusting/downloading the remote JSON schema URL; add a changeset for a patch release.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
yarn.lock	Adds the lockfile entry for prettier after introducing it as a devDependency.
packages/cli/package.json	Adds prettier devDependency used by generate:schema.
packages/cli/src/types.ts	Adds JSDoc descriptions intended to feed schema generation / docs.
packages/cli/schema.json	Adds descriptions to key top-level config fields and Brownie options.
docs/docs/docs/api-reference/configuration.mdx	Documents IDE settings needed to download the schema from oss.callstack.com.
.changeset/young-snails-lose.md	Declares a patch release for @callstack/brownfield-cli.

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