feat: add date_time MessageEntity

[KnightNiwrem]

This pull request adds support for Telegram's date_time message entity, allowing formatted strings to include date and time metadata. The changes upgrade the grammy dependency, update types, add new utility and formatting methods for date_time, and introduce comprehensive tests to ensure correct functionality and consolidation behavior.

Date_time entity support:

• Added a new time function in src/entity-tag.ts to create date_time entity tags, and updated the buildFormatter function to support this entity type.
• Introduced static and instance time methods in the FormattedString class to allow easy creation and combination of date_time formatted strings. [1] [2]
• Added date_time handling to utility functions for entity comparison, consolidation, and sorting in src/util.ts. [1] [2] [3]

Dependency and type updates:

• Upgraded the grammy dependency in package.json and updated the Deno types import to match the new version. [1] [2]

Testing:

• Added new test files for date_time entity formatting and utility functions, covering creation, comparison, and consolidation. [1] [2]

[Copilot]

Pull request overview

Adds first-class support for Telegram’s date_time MessageEntity across the formatting/tag API and entity utilities, aligned with a grammy version bump that exposes the new entity type.

Changes:

• Upgrade grammy dependency and Deno type import to a version that includes date_time.
• Add date_time support to entity-tag creation (time), FormattedString composition, and entity similarity/consolidation/sorting utilities.
• Introduce focused tests for date_time formatting and util behaviors (similarity/equality/consolidation).

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/entity-tag.ts	Refactors buildFormatter and adds time() tag generator for date_time.
src/format.ts	Adds FormattedString.time static + instance helpers built on the new entity tag.
src/util.ts	Extends entity similarity, consolidation keying, and deterministic sorting to account for date_time metadata.
test/format.time.test.ts	Verifies FormattedString.time creates correct date_time entities (with/without format).
test/util.date_time.test.ts	Verifies util equality/similarity and consolidation behavior for date_time.
src/deps.deno.ts	Updates Deno type import for grammy.
package.json	Bumps grammy in dev + peer dependencies.

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