Add meta description tags

src/routes/+page.svelte

@@ -40,6 +40,7 @@
 
 <svelte:head>
     <title>Home | LURE Web</title>
+    <meta name="description" content="LURE Web home page">
     {@html agate}
 </svelte:head>
 

src/routes/pkg/[repo]/[name]/+page.svelte

@@ -27,6 +27,7 @@
 
 <svelte:head>
     <title>{$page.params.name} Package | LURE Web</title>
+    <meta name="description" content="Information about the {$page.params.name} LURE package.">
 </svelte:head>
 
 <Header/>

src/routes/pkg/[repo]/[name]/lure.sh/+page.svelte

@@ -19,6 +19,7 @@
 
 <svelte:head>
     <title>{$page.params.name} Build Script | LURE Web</title>
+    <meta name="description" content="The build script for the {$page.params.name} LURE package.">
     {@html agate}
 </svelte:head>
 

src/routes/pkgs/+page.svelte

@@ -47,6 +47,7 @@
 
 <svelte:head>
     <title>Package Search | LURE Web</title>
+    <meta name="description" content="Search for LURE packages">
 </svelte:head>
 
 <Header/>