chore(landing): derive download version from package.json dynamically

Replace hardcoded v0.2.0 version strings in platform download cards
with the `{version}` variable read from package.json. Bump site
package version to 0.2.0.

package.json

@@ -1,7 +1,7 @@
 {
   "name": "zblade-dev",
   "type": "module",
-  "version": "0.1.1",
+  "version": "0.2.0",
   "scripts": {
     "dev": "astro dev",
     "start": "astro dev",

src/pages/index.astro

@@ -202,7 +202,7 @@ const version = pkg.version ?? "";
             <div class="platform-icon">🪟</div>
             <div class="platform-info">
               <div class="platform-name">WINDOWS</div>
-              <div class="platform-meta">v0.2.0 / x64, arm64</div>
+              <div class="platform-meta">v{version} / x64, arm64</div>
               <div class="platform-formats">MSI, EXE</div>
             </div>
             <div class="platform-action">DOWNLOAD →</div>
@@ -212,7 +212,7 @@ const version = pkg.version ?? "";
             <div class="platform-icon">🍎</div>
             <div class="platform-info">
               <div class="platform-name">macOS</div>
-              <div class="platform-meta">v0.2.0 / arm64 (Apple Silicon)</div>
+              <div class="platform-meta">v{version} / arm64 (Apple Silicon)</div>
               <div class="platform-formats">DMG, TAR.GZ</div>
             </div>
             <div class="platform-action">DOWNLOAD →</div>
@@ -222,7 +222,7 @@ const version = pkg.version ?? "";
             <div class="platform-icon">🐧</div>
             <div class="platform-info">
               <div class="platform-name">LINUX</div>
-              <div class="platform-meta">v0.2.0 / amd64</div>
+              <div class="platform-meta">v{version} / amd64</div>
               <div class="platform-formats">DEB, RPM, AppImage</div>
             </div>
             <div class="platform-action">DOWNLOAD →</div>