Rename adapter and app api objects to Apps and Adapters

[CyberHoward]

Rename App to Apps and Adapter to Adapters to prevent confusions when using the types.

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Latest commit:	ff7e9d2
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[codecov]

Codecov Report

Merging #372 (ff7e9d2) into main (2bcc9e5) will increase coverage by 0.0%.
The diff coverage is 100.0%.

Impacted Files	Coverage Δ
packages/abstract-app/src/lib.rs	70.1% <ø> (ø)
packages/abstract-core/src/objects/namespace.rs	91.5% <ø> (+3.2%)	⬆️
packages/abstract-sdk/src/apis/adapter.rs	99.0% <100.0%> (ø)
packages/abstract-sdk/src/apis/app.rs	99.3% <100.0%> (ø)