feat: updated Schemas and Intents

[JoeCap08055]

Goal

The goal of this PR is to implement the design described here

Tracking epic: #2550

Checklist

• [x] Updated Pallet Readme?
• [x] Updated js/api-augment for Custom RPC APIs?
• [x] Design doc(s) updated?
• [x] Unit Tests added?
• [x] e2e Tests added?
• [x] Benchmarks added?
• [x] Spec version incremented?

[codecov[bot]]

Codecov Report

:x: Patch coverage is 61.40758% with 499 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
pallets/stateful-storage/src/lib.rs	36.18%	127 Missing :warning:
pallets/schemas/src/migration/v5.rs	0.00%	94 Missing :warning:
pallets/schemas/src/lib.rs	77.80%	89 Missing :warning:
pallets/stateful-storage/src/migration/v1/types.rs	56.86%	44 Missing :warning:
pallets/messages/src/lib.rs	34.84%	43 Missing :warning:
pallets/messages/src/types.rs	64.47%	27 Missing :warning:
common/primitives/src/stateful_storage.rs	32.14%	19 Missing :warning:
common/primitives/src/schema.rs	37.03%	17 Missing :warning:
common/primitives/src/messages.rs	0.00%	11 Missing :warning:
pallets/schemas/src/types.rs	56.52%	10 Missing :warning:
... and 3 more

Files with missing lines	Coverage Δ
common/primitives/src/cid.rs	100.00% <100.00%> (ø)
pallets/messages/src/rpc/src/lib.rs	92.00% <100.00%> (-3.84%)	:arrow_down:
pallets/msa/src/rpc/src/lib.rs	67.28% <100.00%> (ø)
pallets/msa/src/types.rs	100.00% <100.00%> (ø)
pallets/schemas/src/rpc/src/lib.rs	100.00% <ø> (+5.71%)	:arrow_up:
pallets/stateful-storage/src/migration/v2.rs	92.44% <ø> (ø)
pallets/stateful-storage/src/rpc/src/lib.rs	86.48% <ø> (ø)
...allets/stateful-storage/src/stateful_child_tree.rs	74.25% <ø> (+3.20%)	:arrow_up:
pallets/stateful-storage/src/test_common.rs	100.00% <ø> (ø)
pallets/stateful-storage/src/types.rs	78.66% <ø> (-14.44%)	:arrow_down:
... and 13 more

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[enddynayn]

Looking good so far 3/4 done with review.