feat(interface): php_impl_interface macro

[kakserpom]

Implements #590 and #308

[coveralls]

Pull Request Test Coverage Report for Build 20415314041

Details

• 9 of 57 (15.79%) changed or added relevant lines in 7 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.3%) to 35.829%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/class.rs	0	2	0.0%
src/builders/module.rs	1	4	25.0%
src/builders/class.rs	3	7	42.86%
src/internal/class.rs	0	4	0.0%
crates/macros/src/lib.rs	0	8	0.0%
crates/macros/src/interface.rs	5	16	31.25%
crates/macros/src/impl_interface.rs	0	16	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/builders/class.rs	1	58.96%

Totals
Change from base Build 20412913109:	-0.3%
Covered Lines:	1680
Relevant Lines:	4689

---

💛 - Coveralls