Improve the installation description

[AlexRMU]

unplugin-typia version

What platform is your computer? Copy the output of npx envinfo --system -npmPackages cleye --binaries

No response

Describe the bug

Add to the description that the plugin should be added to the list of plugins before others, preferably the very first.
You also need to add a description of the alias restrictions (samchon/typia#538).

Reproduction

Validations

• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug.
• The provided reproduction is a minimal reproducible example of the bug.

[ryoppippi]

PRs are welcome!