fix: Add catalog pages to docs.

[liurenjie1024]

Close apache/iceberg#8850

[nastra]

I think the initial goal was to have a Concepts section on the website and that catalog page was the first page to be shown here. So I think what we want here is

diff --git a/docs/config.toml b/docs/config.toml
index 2722d7d0..a918b64a 100644
--- a/docs/config.toml
+++ b/docs/config.toml
@@ -56,6 +56,8 @@ home = [ "HTML", "RSS", "SearchIndex" ]
     { name = "Multi-Engine Support", parent = "Project", pre = "relative", url = "../../multi-engine-support", weight = 450 },
     { name = "How To Release", parent = "Project", pre = "relative", url = "../../how-to-release", weight = 500 },
     { name = "Terms", parent = "Project", pre = "relative", url = "../../terms", weight = 600 },
+    { name = "Concepts", weight = 1150 },
+    { name = "Catalogs", url = "/concepts/catalog", parent = "Concepts" },
     { name = "ASF", weight = 1200 },
     { name = "License", identifier = "_license", parent = "ASF", url = "https://www.apache.org/licenses/" },
     { name = "Security", identifier = "_security", parent = "ASF", url = "https://www.apache.org/security/" },
diff --git a/landing-page/config.toml b/landing-page/config.toml
index f14d2ff1..e95312de 100644
--- a/landing-page/config.toml
+++ b/landing-page/config.toml
@@ -67,6 +67,8 @@ home = [ "HTML", "RSS", "SearchIndex" ]
     { name = "Multi-Engine Support", url = "/multi-engine-support", parent = "Project", weight = 450 },
     { name = "How To Release", parent = "Project", url = "/how-to-release", weight = 500 },
     { name = "Terms", url = "/terms", parent = "Project", weight = 600 },
+    { name = "Concepts", weight = 1150 },
+    { name = "Catalogs", url = "/concepts/catalog", parent = "Concepts" },
     { name = "ASF", weight = 1200 },
     { name = "License", identifier = "_license", parent = "ASF", url = "https://www.apache.org/licenses/" },
     { name = "Security", identifier = "_security", parent = "ASF", url = "https://www.apache.org/security/" },

[liurenjie1024]

Hi, @nastra I followed you instruction to add it, it goes well mostly but with one thing:

The headers are wrapped, do you know how to fix it? I'm not familiar with hugo.

[liurenjie1024]

Hi, @nastra I followed you instruction to add it, it goes well mostly but with one thing:

The headers are wrapped, do you know how to fix it? I'm not familiar with hugo.

Never mind, my friend helped me to solve it.

[nastra]

LGTM, thanks @liurenjie1024 for fixing this