Cleanup parser statements, add delete and insert statement, add TASKS.md for tracking tasks

sql/parseDeleteStatement.go

@@ -0,0 +1,15 @@
+package sql
+
+func (p *Parser) parseDelete() (*DeleteStatement, error) {
+	if !p.expectSequence(FROM, IDENT) {
+		return nil, p.unexpectedToken(INTO)
+	}
+
+	res := DeleteStatement{}
+
+	_, _, res.Table = p.rescan()
+
+	p.consumeUntilOne(50, EOF, SEMI)
+
+	return &res, nil
+}