Add rule for Intl Locale Info API

[ota-meshi]

This PR adds rules to disallow methods from the ES2026 Intl Locale Info API proposal.

https://github.com/tc39/proposal-intl-locale-info

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🦋 Changeset detected

Latest commit: 1ee603e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
eslint-plugin-es-x	Minor

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[Copilot]

Pull request overview

This PR adds rules to disallow methods and properties from the ES2026 Intl Locale Info API proposal, which introduces new ways to query locale information. The proposal recently changed from using getter properties to using methods (per tc39/proposal-intl-locale-info#67), except for firstDayOfWeek which remains a getter property.

Key changes:

• Added 8 new ESLint rules: 7 for methods (getCalendars, getCollations, getHourCycles, getNumberingSystems, getTextInfo, getTimeZones, getWeekInfo) and 1 for a property (firstDayOfWeek)
• Updated well-known-properties to distinguish between the old getter-based API (now considered non-standard) and the new method-based API
• Created new configuration presets no-intl-locale-info and updated no-new-in-esnext-intl-api
• Enhanced the scripts/new-rule.js generator to support prototype property rules with Intl API detection

Reviewed changes

Copilot reviewed 43 out of 43 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
lib/rules/no-intl-locale-prototype-*.js (8 files)	New rule implementations for disallowing Intl Locale Info API methods and properties
tests/lib/rules/no-intl-locale-prototype-*.js (8 files)	Comprehensive test suites including TypeScript type checking tests
lib/util/well-known-properties.js	Added 8 new Intl.Locale prototype properties to the well-known properties list
tests/lib/util/well-known-properties.js	Updated to filter out deprecated getter properties and keep only the new method-based API as standard
lib/configs/*.js (4 files)	Added new config presets for no-intl-locale-info and updated no-new-in-esnext-intl-api
lib/index.js	Registered all 8 new rules and exported the new configs
docs/rules/*.md (8 files)	Complete documentation for each new rule
docs/rules/index.md	Added ES2026 Intl API section listing all 8 rules
docs/configs/index.md	Documented the new no-intl-locale-info config
scripts/proposals.js	Added intl-locale-info proposal entry
scripts/new-rule.js	Enhanced to support prototype properties, link prompts, and Intl API categorization
.changeset/*.md (8 files)	Changesets for each new rule

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