feat: add Zotero 10 support

Bump strict_max_version to 10.0.* and esbuild target to firefox140
(Zotero 9/10 Firefox 140 ESR base). Update docs accordingly.

zotero-plugin.config.ts

@@ -18,7 +18,7 @@ export default defineConfig({
       {
         entryPoints: ["src/index.ts"],
         bundle: true,
-        target: "firefox128",
+        target: "firefox140",
         outfile: ".scaffold/build/addon/content/scripts/index.js",
       },
     ],