docs: update Node.js requirement and add Corepack tip to installation guide

[SarthakAag]

This PR improves the Installation guide by updating outdated requirements and adding helpful setup guidance for modern Node.js environments.

Changes included:

Updated the minimum Node.js requirement from 10.13.0 to 14.15.0.

Added a Corepack tip explaining how users running Node.js 16.10+ can enable Corepack to manage package managers such as yarn and pnpm.

Improved wording by replacing "dev dependencies" with "development dependencies" for clearer terminology.

These changes help keep the documentation aligned with current Node.js practices and improve the setup experience for developers following the installation guide.

What kind of change does this PR introduce?

This PR introduces documentation improvements (docs).
It updates outdated information and adds helpful guidance for developers setting up webpack.

Did you add tests for your changes?
No.
This change only affects documentation and does not modify application code or functionality.

Does this PR introduce a breaking change?
No.
This PR only updates documentation and does not affect existing functionality or APIs.

If relevant, what needs to be documented once your changes are merged or what have you already documented?

All relevant documentation updates are included in this PR:

Updated Node.js requirement

Added Corepack tip for managing package managers

Improved wording for development dependencies

Use of AI

AI was used to assist with improving the clarity and wording of the documentation changes.
All content was reviewed and verified before submitting the pull request.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: SarthakAag / name: Sarthak Agarwal (a48ff67)