feat: adding Display implementation to DELETE and INSERT

[seve-martinez]

Closes #1420 .

[coveralls]

Pull Request Test Coverage Report for Build 10976627530

Details

• 55 of 61 (90.16%) changed or added relevant lines in 2 files are covered.
• 11 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.01%) to 89.34%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/ast/dml.rs	54	60	90.0%

Files with Coverage Reduction	New Missed Lines	%
src/ast/mod.rs	11	82.09%

Totals
Change from base Build 10971828683:	-0.01%
Covered Lines:	29668
Relevant Lines:	33208

---

💛 - Coveralls

[iffyio]

@seve-martinez could you take a look at the ci faiiure? I think you might need to fetch the latest changes from main for the codestyle step