Add --offset flag to atuin search

This flag allows the user to continue searching at an offset. This is
useful for building tools that use atuin to search for previous
commands and return only one result.

```

atuin search --limit 1
atuin search --limit 1 --offset 1
atuin search --limit 1 --offset 2
```

atuin-client/src/database.rs

@@ -34,6 +34,7 @@ pub struct OptFilters {
     pub before: Option<String>,
     pub after: Option<String>,
     pub limit: Option<i64>,
+    pub offset: Option<i64>,
 }
 
 pub fn current_context() -> Context {
@@ -361,6 +362,10 @@ impl Database for Sqlite {
             sql.limit(limit);
         }
 
+        if let Some(offset) = filter_options.offset {
+            sql.offset(offset);
+        }
+
         match filter {
             FilterMode::Global => &mut sql,
             FilterMode::Host => sql.and_where_eq("hostname", quote(&context.hostname)),

src/command/client/search.rs

@@ -49,6 +49,10 @@ pub struct Cmd {
     #[arg(long)]
     limit: Option<i64>,
 
+    /// Offset from the start of the results
+    #[arg(long)]
+    offset: Option<i64>,
+
     /// Open interactive search UI
     #[arg(long, short)]
     interactive: bool,
@@ -111,6 +115,7 @@ impl Cmd {
                 before: self.before,
                 after: self.after,
                 limit: self.limit,
+                offset: self.offset,
             };
 
             let mut entries =