docs: Korean translation of React Labs blog post: View Transitions, Activity and more (#1230)

This PR translates the React Labs blog post "View Transitions, Activity,
and more" from English to Korean following the established translation
guidelines and glossary.

## Changes Made

- **Complete translation** of
`src/content/blog/2025/04/23/react-labs-view-transitions-activity-and-more.md`
- **Preserved MDX syntax** and code blocks as required
- **Applied translation glossary** consistently for technical terms
- **Maintained Korean writing style** consistent with existing
translated content

## Translation Guidelines Followed

- Used formal Korean writing style (합니다/습니다 endings)
- Applied translations from `wiki/translate-glossary.md` and
`wiki/translate-glossary-legacy.md`
- Kept technical terms untranslated where specified (React, props,
state, etc.)
- Followed `CONTRIBUTING.md` style guidelines
- Preserved all markdown/MDX formatting and code examples

## Key Sections Translated

- **New Experimental Features**: View Transitions and Activity APIs
- **Features in Development**: React Performance Tracks, Automatic
Effect Dependencies, Compiler IDE Extension, Fragment Refs, Gesture
Animations, Concurrent Stores
- **Technical explanations** using proper Korean terminology per
established glossary
- **React Conf 2025 announcement** and call for speakers

## Quality Assurance

- ✅ Build passes successfully with no syntax errors
- ✅ Korean text follows established conventions from existing translated
content
- ✅ All technical terms translated consistently per glossary
- ✅ MDX components and code blocks preserved intact
- ✅ Links and references maintained correctly

The translation maintains the technical accuracy while making the
content accessible to Korean-speaking React developers, following the
same high standards established in other translated React documentation.

> [!WARNING]
>
> <details>
> <summary>Firewall rules blocked me from connecting to one or more
addresses</summary>
>
> #### I tried to connect to the following addresses, but was blocked by
firewall rules:
>
> - `conf.reactjs.org`
> - Triggering command: `curl REDACTED --output
public/fonts/Optimistic_Display_Arbc_W_Bd.woff2` (dns block)
> - Triggering command: `curl REDACTED --output
public/fonts/Optimistic_Display_Arbc_W_Md.woff2` (dns block)
> - Triggering command: `curl REDACTED --output
public/fonts/Optimistic_Display_Cyrl_W_Bd.woff2` (dns block)
>
> If you need me to access, download, or install something from one of
these locations, you can either:
>
> - Configure [Actions setup
steps](https://gh.io/copilot/actions-setup-steps) to set up my
environment, which run before the firewall is enabled
> - Add the appropriate URLs or hosts to my [firewall allow
list](https://gh.io/copilot/firewall-config)
>
> </details>



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---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: lumirlumir <[email protected]>
Co-authored-by: 루밀LuMir <[email protected]>

Author: Copilot