Add pagination to search results.

Move to shared definition of json requests between client/server.

notmuch/src/lib.rs

@@ -478,8 +478,19 @@ impl Notmuch {
         self.run_notmuch(std::iter::empty::<&str>())
     }
 
-    pub fn search(&self, query: &str) -> Result<SearchSummary, NotmuchError> {
-        let res = self.run_notmuch(["search", "--format=json", "--limit=20", query])?;
+    pub fn search(
+        &self,
+        query: &str,
+        offset: usize,
+        limit: usize,
+    ) -> Result<SearchSummary, NotmuchError> {
+        let res = self.run_notmuch([
+            "search",
+            "--format=json",
+            &format!("--offset={offset}"),
+            &format!("--limit={limit}"),
+            query,
+        ])?;
         Ok(serde_json::from_slice(&res)?)
     }