fix: include transitive type declarations with eslint

[sallustfire]

typescript-eslint requires type declarations for imports when evaluating type checked lint rules. These declarations are included as inputs to the eslint action and a regression test under examples/ is included to confirm that types from both npm packages and locally imported sources are resolved.

Changes are visible to end-users: yes

• Searched for relevant documentation and updated as needed: no
• Breaking change (forces users to change their own code or config): yes
• Suggested release notes appear below: no

Test plan

• New test cases added

Fixes #335

[sallustfire]

@alexeagle A couple notes:

• A very old version of moment is included in the examples, so old that it doesn't even have type declarations. I opted to use dayjs as a placeholder to depend on the types of some npm package. I don't follow the thinking in subdir/ where moment is used, so there may be artifacts or this all can be consolidated.
• I did get bats to work, but ktlint was consistently failing. It looked like a structural error, so I commented it out, but we should revert that if it works in CI and there is just some hermeticity leak that causes it to fail on my system.
• There's a large diff in the pnpm lockfile, maybe someone applied a formatter to it? I believe this is the generated pnpm style though.

[alexeagle]

That was simple, thanks!

[sallustfire]

@alexeagle No problem. Thanks for reviewing. It probably can be polished a little bit more e.g. we don't need sources for the deps just the transitive declarations. Stuff like that might help in larger repos?