Configure Renovate for automated Poetry dependency updates

[Harikrishna-2016]

• This contribution adheres to CONTRIBUTING.md

What does this Pull Request accomplish?

• Adds Renovate configuration for automated dependency management.
• Applies NI Python Renovate presets and repository-specific settings.
• Updates pyproject.toml dependency definitions to align with recommended version constraints.
• Adds a poetry.toml file and configures solver.min-release-age = "14 days".

Why should this Pull Request be merged?

• Automates dependency updates and reduces manual maintenance effort.
• Improves security by keeping dependencies up to date.
• Improves dependency resolution consistency through Poetry configuration updates.
• This helps improve dependency stability by preventing the use of very recently released package versions.

What testing has been done?

• Validated the Renovate configuration syntax, renovate.json
• Validated pyproject.toml syntax and dependency declarations.
• Verified the Poetry configuration syntax, poetry.toml

[Harikrishna-2016]

Hi,

Solver settings were introduced in Poetry 2.4.0. NI Actions currently uses Poetry 2.1.4, and according to ni/python-renovate-config, the solver.min-release-age setting is ignored by Poetry 2.3.x and earlier.
We’ve added this configuration in line with the approach used in hightime and nidaqmx-python, so that the solver settings are already in place when we eventually upgrade to Poetry 2.4.0 or later.

Thanks!