chore(release): bump version to v0.1.2

[0ngk]

This pull request updates the project and its dependencies to newer versions. The most important changes are version bumps for both the project itself and several dependencies, ensuring compatibility with the latest features and bug fixes.

Dependency updates:

• Upgraded gleam_stdlib from version 0.70.0 to 0.71.0 in manifest.toml.
• Upgraded gleam_time from version 1.7.0 to 1.8.0 in manifest.toml.
• Updated the local dependency kitazith from version 0.1.0 to 0.1.2 in manifest.toml.

Project version update:

• Bumped the project version in gleam.toml from 0.1.1 to 0.1.2.