fix(deps): Update @hey-api/openapi-ts to 0.43.0

[seriouslag]

In this PR,

• Update to @hey-api/openapi-ts to 0.43.0
• Update other dependencies
• Share the same OpenAPI spec file for examples
• list @hey-api/openapi-ts as a dependency, instead of a peerDependency since we are using a pinned version and never a loose version.

closes #89

A note: we are in need of an example/test for enums.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🟢	Lines	99.07% (🎯 95%)	1817 / 1834
🟢	Statements	99.07% (🎯 95%)	1817 / 1834
🟢	Functions	100% (🎯 95%)	40 / 40
🟢	Branches	94.51% (🎯 85%)	155 / 164

File Coverage

File	Stmts	% Branch	% Funcs	% Lines	Uncovered Lines
Changed Files
src/generate.mts	100%	100%	100%	100%

Generated in workflow #264