feat(Timestamp) - timestamp can be f64, u64 or string

[nudded]

No description provided.

[Copilot]

PR Overview

This PR implements support for multiple timestamp formats (f64, u64, or string) by updating the conversion logic and tests across Rust and Ruby components, and it bumps the version of the packages.

• Added a new From implementation for ExpressionValue.
• Modified Event.timestamp to use PropertyValue instead of a raw u64 and added From conversion.
• Updated tests and package versions in JavaScript and Ruby integrations.

Reviewed Changes

File	Description
expression-core/src/evaluate.rs	Adds conversion from PropertyValue to ExpressionValue and updates timestamp handling.
expression-core/src/event.rs	Changes Event.timestamp to PropertyValue, adds From impl, and updates tests.
expression-js/Cargo.toml	Bumps package version.
expression-core/Cargo.toml	Bumps package version.
expression-ruby/lib/lago-expression.rb	Bumps gem version.
expression-js/src/lib.rs	Updates timestamp conversion for the JS binding.
expression-ruby/ext/lago_expression/src/lib.rs	Updates timestamp conversion for the Ruby extension.
expression-ruby/lago-expression.gemspec	Bumps gem version.

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

[jdenquin]

Just for my knowledge, we now ensure that we support conversion from String that can be an Integer or a Float right?

[nudded]

Just for my knowledge, we now ensure that we support conversion from String that can be an Integer or a Float right?

Yes indeed.