feat: add zachleat.com-inspired theme enhancements

- Add time-difference web component for relative dates
- Add @zachleat/table-saw for responsive tables
- Add webmention facepile styling with bookmarks support
- Add OG image thumbnails to post navigation
- Add @11ty/is-land for lazy widget hydration
- Wrap sidebar widgets in is-land for deferred loading
- Lazy-load webmention avatars with is-land
- Add @zachleat/filter-container for blog archive filtering
- Add posting frequency sparkline to blog header
- Inline critical CSS and defer full stylesheet loading

package-lock.json

@@ -13,11 +13,14 @@
         "@11ty/eleventy-img": "^6.0.0",
         "@11ty/eleventy-plugin-rss": "^2.0.2",
         "@11ty/eleventy-plugin-syntaxhighlight": "^5.0.2",
+        "@11ty/is-land": "^5.0.1",
         "@atproto/api": "^0.12.0",
         "@chrisburnell/eleventy-cache-webmentions": "^2.2.7",
         "@fontsource/inter": "^5.2.8",
         "@quasibit/eleventy-plugin-sitemap": "^2.2.0",
         "@resvg/resvg-js": "^2.6.2",
+        "@zachleat/filter-container": "^4.0.0",
+        "@zachleat/table-saw": "^1.0.7",
         "eleventy-plugin-embed-everything": "^1.21.0",
         "gray-matter": "^4.0.3",
         "html-minifier-terser": "^7.0.0",
@@ -259,6 +262,16 @@
         "url": "https://opencollective.com/11ty"
       }
     },
+    "node_modules/@11ty/is-land": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/@11ty/is-land/-/is-land-5.0.1.tgz",
+      "integrity": "sha512-Rh/sLhE4vrc2JaSjeY385v2UxnDY9BhnQtitETb3SKyr0A48Q5Vn06q2AvDBHObtk9+dcFWsoZX4jhT+O9g+xQ==",
+      "license": "MIT",
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/11ty"
+      }
+    },
     "node_modules/@11ty/lodash-custom": {
       "version": "4.17.21",
       "resolved": "https://registry.npmjs.org/@11ty/lodash-custom/-/lodash-custom-4.17.21.tgz",
@@ -1338,6 +1351,18 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@zachleat/filter-container": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/@zachleat/filter-container/-/filter-container-4.0.0.tgz",
+      "integrity": "sha512-4etUifhHciQTMtlDymb4cus03qYZrKiuK0gY0cOU4Jrt0LA3ZvPVTwO6esqUdvbpte5ypodmpx84wwbT3Fy5Jw==",
+      "license": "MIT"
+    },
+    "node_modules/@zachleat/table-saw": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/@zachleat/table-saw/-/table-saw-1.0.7.tgz",
+      "integrity": "sha512-AxYShldkUoofdzqyH/pgbiXBgoRbFtoQYKbCjTK7diViqepM2SqZoMZm7ofc9UeGaDWgktAOmoJg3T+yN0SAxA==",
+      "license": "MIT"
+    },
     "node_modules/a-sync-waterfall": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/a-sync-waterfall/-/a-sync-waterfall-1.0.1.tgz",