Initial QSfera import

Server/services/search/pkg/query/query.go

@@ -0,0 +1,19 @@
+// Package query provides functions to work with the different search query flavours.
+package query
+
+import "github.com/qsfera/server/pkg/ast"
+
+// Builder is the interface that wraps the basic Build method.
+type Builder interface {
+	Build(qs string) (*ast.Ast, error)
+}
+
+// Compiler is the interface that wraps the basic Compile method.
+type Compiler[T any] interface {
+	Compile(ast *ast.Ast) (T, error)
+}
+
+// Creator is the interface that wraps the basic Create method.
+type Creator[T any] interface {
+	Create(qs string) (T, error)
+}