remove Searcher from PlumeRocket and add a FromRequest to retrieve it

this will not compile, so now it's time to fix the rest

@@ -175,15 +186,16 @@ impl Searcher {
         let lang = schema.get_field("lang").unwrap();
         let license = schema.get_field("license").unwrap();
 
+        let conn = self.dbpool.get().unwrap();

@@ -222,24 +229,27 @@ impl Searcher {
         let searcher = self.reader.searcher();
         let res = searcher.search(&query.into_query(), &collector).unwrap();
 
+        let conn = self.dbpool.get().unwrap();

@@ -40,6 +40,7 @@ pub enum Error {
     Io(std::io::Error),
     MissingApProperty,
     NotFound,
+    DbPool,

@@ -177,1 +188,4 @@
 
+        let conn = match self.dbpool.get() {
+            Ok(c) => c,
+            Err(_) => return Err(Error::DbPool),

@@ -31,0 +55,4 @@
+    ///
+    /// The panic messages are normally explicit enough for a human to
+    /// understand how to fix the issue when they see it.
+    pub fn new(db_pool: DbPool) -> Arc<Self> {