Add Spanish translation for Conditionals and Interactivity tutorial

[xdroberto]

Adds the Spanish translation of the Conditionals and Interactivity tutorial, addressing the Spanish part of #1379. This follows #1558 (Spanish translation of Introduction to GLSL).

Notes on the translation:

• 1:1 structural parity with the English original (915 lines): all code blocks, components, tables, and markup are untouched. Code comments and the placeholder text inside AnnotatedLine are translated, following the convention of the existing Korean and Chinese translations; code identifiers (including the condition placeholder in the syntax samples) are kept in English.
• Only title, description, and featuredImageAlt are translated in the frontmatter.
• The English source uses non-breaking spaces for indentation in several code blocks; these are normalized to regular spaces in the translation, as the Hindi translation of variables-and-change.mdx already does. This keeps the samples safe to copy into an editor.
• Validated locally with the dev server: /es/tutorials/conditionals-and-interactivity/ renders correctly.

Three errors in the English source

While translating, I found three places where the English text contradicts its own code samples. I wrote the technically correct version in Spanish rather than propagating the errors to Spanish readers, so I want to flag them explicitly:

1. Line 700 — "Make the sun move by changing the sunHeight variable as long as it is less than 130", but the code right below is if (sunHeight > 130). It should read greater than 130.
2. Line 775 — "The value in sunHeight stops changing once the Boolean expression ... is false. This happens when sunHeight is any value greater than 130." It is the opposite: the expression becomes false when sunHeight is less than or equal to 130.
3. Lines 846 and 848 — the logical-operators section asks for sunHeight "less than 130 AND greater than 480", and the sample reads if (sunHeight < 130 && sunHeight > 480). That condition can never be true; based on the preceding nested conditional it should be if (sunHeight > 130 && sunHeight < 480).

This last one is the only line of code in the file that differs from the English original. I am happy to open a separate PR fixing the English source (and to revert the Spanish to a literal translation instead) — whichever you prefer.