Fix broken anchor links by converting docs to absolute paths

[Irozuku]

Summary

This pull request standardizes all internal documentation links (English and Spanish) to use absolute paths instead of relative ones. This resolves navigation issues where anchor links (#...) could incorrectly append trailing slashes (e.g., /path/#section), breaking in-page references.

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Type of Change

Check all that apply like this [x]:

• Backend change
• Frontend change
• CI / Workflow change
• Build / Packaging change
• Bug fix
• Documentation

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Changes (by file)

• docs/docs/** (English docs): Converted all internal links to absolute paths (/...) to ensure consistent navigation and correct anchor resolution.
• i18n/es/docusaurus-plugin-content-docs/** (Spanish docs): Applied the same absolute path conversion for consistency across locales.
• Multiple documentation files: Fixed table formatting and alignment issues to improve readability.

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Testing (optional)

• Verified navigation across multiple documentation pages to ensure links resolve correctly.
• Confirmed that anchor links (#section) no longer break due to incorrect path resolution or trailing slash issues.