Add project text search panel

src/session.zig

@@ -138,8 +138,15 @@ pub const Session = struct {
     }
 
     pub fn openFixture(self: *Session, fixture: []const u8) !void {
+        try self.openFixtureAt(fixture, 0);
+    }
+
+    pub fn openFixtureAt(self: *Session, fixture: []const u8, cursor_byte: usize) !void {
         if (self.buffer) |*buffer| buffer.deinit();
-        self.buffer = try Buffer.openFromBytes(self.allocator, fixture);
+        var buffer = try Buffer.openFromBytes(self.allocator, fixture);
+        buffer.cursor.byte = previousBoundary(buffer.bytes.items, @min(cursor_byte, buffer.bytes.items.len));
+        buffer.refreshCell();
+        self.buffer = buffer;
     }
 
     pub fn dispatch(self: *Session, command: Command) !void {