Add --offset flag to atuin search (#825)

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 =