Add inspect command

[javiermtorres]

A tentative implementation of an inspect command has been added, exposing and reusing the existing load_assets function.

Closes #201

[codecov-commenter]

Codecov Report

❌ Patch coverage is 81.25000% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
encoderfile/src/build_cli/cli/mod.rs	0.00%	3 Missing ⚠️

Files with missing lines	Coverage Δ
encoderfile-runtime/src/main.rs	0.00% <ø> (ø)
encoderfile/src/build_cli/cli/inspect.rs	100.00% <100.00%> (ø)
encoderfile/src/format/footer.rs	99.18% <ø> (ø)
encoderfile/src/runtime/loader.rs	60.29% <100.00%> (+60.29%)	⬆️
encoderfile/src/build_cli/cli/mod.rs	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

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