docs(components): improve link text for clarity and accessibility

[mikoloism]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/docs.nestjs.com/blob/master/CONTRIBUTING.md

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Docs
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

The documentation now contains more descriptive link text, improving clarity and accessibility for users.

Does this PR introduce a breaking change?

• Yes
• No

Other information

This commit updates the documentation to replace generic link text with more descriptive and meaningful phrases. The changes enhance clarity and improve accessibility for users, particularly those using screen readers.

• Replaced "here" with specific descriptions in multiple sections, including references to custom providers, dependency injection, injection scopes, and modules.
• Ensured that all hyperlinks provide clear context, making navigation more intuitive for readers.

These improvements align with best practices for documentation and contribute to a better user experience.

[mikoloism]

I want to improve other pages too, am I allowed?