[C API] NP_GetType implementation

[vkuzmin-uber]

Summary:

Continue with basic implementation of a C API for Neuropod. Issue #407

Test Plan:

Added test for input and output tensors.

[VivekPanyam]

Looks good.

Can we also start adding additional unit tests where necessary instead of just a single integration test covering the C API?

[VivekPanyam]

(Also, ./tools/lint.sh and ./tools/autofix.sh to fix the formatting issues - https://neuropod.ai/developing/#lint-and-static-analysis)

[vkuzmin-uber]

Looks good.

Can we also start adding additional unit tests where necessary instead of just a single integration test covering the C API?

Good point. I will update test.

[codecov]

Codecov Report

Merging #419 into master will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #419      +/-   ##
==========================================
+ Coverage   89.46%   89.47%   +0.01%     
==========================================
  Files          90       90              
  Lines        5193     5199       +6     
==========================================
+ Hits         4646     4652       +6     
  Misses        547      547              

Impacted Files	Coverage Δ
source/neuropod/bindings/c/c_api.cc	100.00% <100.00%> (ø)
source/neuropod/bindings/c/np_tensor.cc	80.00% <100.00%> (+5.00%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6c3d499...770d9cf. Read the comment docs.