chore: include dist artifacts, update install docs

- .gitignore: remove dist/ exclusion
- README.md: full install methods (npm/CDN/ESM/CJS/Browser)
- site/index.html: add install section with 4 methods
- site/demo.html: fix dist path reference
- site/docs.html: fix dist filename reference

site/docs.html

@@ -108,7 +108,7 @@ npm install @metona-team/MetonaSqlark
 <span class="k">import</span> { MetonaSqlark, MeSqlark } <span class="k">from</span> <span class="s">'MetonaSqlark'</span>;
 
 <span class="c">// Browser</span>
-&lt;script src=<span class="s">"MetonaSqlark.min.js"</span>&gt;&lt;/script&gt;
+&lt;script src=<span class="s">"metona-sqlark.min.js"</span>&gt;&lt;/script&gt;
 <span class="c">// → window.MetonaSqlark / window.MeSqlark</span></pre>
 
 <h2 id="create">🏗 创建数据库</h2>