Use Ructe (#327)

All the template are now compiled at compile-time with the `ructe` crate.

I preferred to use it instead of askama because it allows more complex Rust expressions, where askama only supports a small subset of expressions and doesn't allow them everywhere (for instance, `{{ macro!() | filter }}` would result in a parsing error).

The diff is quite huge, but there is normally no changes in functionality.

Fixes #161 and unblocks #110 and #273

templates/search/result.rs.html

@@ -0,0 +1,27 @@
+@use templates::{base, partials::post_card};
+@use template_utils::*;
+@use plume_models::posts::Post;
+
+@(ctx: BaseContext, query_str: &str, articles: Vec<Post>, page: i32, n_pages: i32)
+
+@:base(ctx, i18n!(ctx.1, "Search result for \"{0}\""; query_str).as_str(), {}, {}, {
+    <h1>@i18n!(ctx.1, "Search result")</h1>
+    <p>@query_str</p>
+
+    @if articles.is_empty() {
+        <section>
+	    @if page == 1 {
+                <h2>@i18n!(ctx.1, "No result for your query")</h2>
+	    } else {
+                <h2>@i18n!(ctx.1, "No more result for your query")</h2>
+	    }
+        </section>
+    } else {
+        <div class="cards">
+            @for article in articles {
+                @:post_card(ctx, article)
+            }
+        </div>
+    }
+    @paginate(ctx.1, page, n_pages)
+})