Hide sov-modules-macros for all public APIs; re-export from sov-modules-api

[neysofu]

Description

My goal with this PR is to collect feedback –and not necessarily merge right away, unless feedback is positive– about a total removal of the sov_modules_macros from all public APIs. The less crates the user has to interact with, the better, from my POV; this pattern is also popular in well-regarded crates like serde.

The current contents of the sov-modules-macros crates will get re-exported by sov-modules-api as following:

• Trait derives will be available at the root module sov_modules_api, which allows for importing the derive macro together with the trait.
• rpc_gen, cli_parser, DefaultRuntime and all other proc macros (for which there's no homonymous trait) will be available under sov_modules_api::macros.

All of these will be gated by the macros feature flag.

Testing

Relying on current tests. Doctests have been updated as necessary.

Docs

Examples and READMEs have been updated.

[codecov]

Codecov Report

Merging #542 (ad2143d) into nightly (11cb807) will increase coverage by 0.0%.
The diff coverage is 0.0%.

Impacted Files	Coverage Δ
.../module-implementations/module-template/src/lib.rs	95.2% <0.0%> (ø)
...tem/module-implementations/sov-accounts/src/lib.rs	95.2% <0.0%> (ø)
...m/module-implementations/sov-accounts/src/query.rs	92.8% <ø> (ø)
...-system/module-implementations/sov-bank/src/lib.rs	97.5% <0.0%> (ø)
...ystem/module-implementations/sov-bank/src/query.rs	91.4% <ø> (ø)
...module-implementations/sov-blob-storage/src/lib.rs	100.0% <ø> (ø)
...e-system/module-implementations/sov-evm/src/lib.rs	100.0% <ø> (ø)
...e-implementations/sov-prover-incentives/src/lib.rs	52.7% <0.0%> (ø)
...-implementations/sov-sequencer-registry/src/lib.rs	98.1% <0.0%> (ø)
...mplementations/sov-sequencer-registry/src/query.rs	75.0% <ø> (ø)
... and 2 more

... and 2 files with indirect coverage changes