Rename AppTemplate to StfBlueprint

[bkolad]

Description

Rename AppTemplate to StfBlueprint

Testing

CI passes.

Docs

All docs updated.

[codecov]

Codecov Report

Merging #1144 (33e9cc8) into nightly (060820f) will decrease coverage by 0.1%.
The diff coverage is 100.0%.

Files	Coverage Δ
...tions/integration-tests/src/chain_state/helpers.rs	77.2% <ø> (ø)
...tations/integration-tests/src/chain_state/tests.rs	97.1% <100.0%> (ø)
...ule-system/sov-modules-rollup-blueprint/src/lib.rs	91.6% <100.0%> (ø)
...em/sov-modules-rollup-blueprint/src/runtime_rpc.rs	100.0% <ø> (ø)
...dule-system/sov-modules-stf-blueprint/src/batch.rs	100.0% <ø> (ø)
...tem/sov-modules-stf-blueprint/src/kernels/basic.rs	100.0% <ø> (ø)
module-system/sov-modules-stf-blueprint/src/lib.rs	89.8% <ø> (ø)
...tem/sov-modules-stf-blueprint/src/stf_blueprint.rs	87.9% <ø> (ø)
...ystem/sov-modules-stf-blueprint/src/tx_verifier.rs	100.0% <ø> (ø)
module-system/utils/sov-data-generators/src/lib.rs	100.0% <100.0%> (ø)

... and 1 file with indirect coverage changes