chore(meta): move lib manual seal as meta consensus

[canonbrother]

What this PR does / why we need it:

Moving lib_manual-seal to local for customizing in future, eg: handling DNC txs

Which issue(s) does this PR fixes?:

Fixes part of #89

Additional comments?:

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[codecov[bot]]

Codecov Report

Base: 6.63% // Head: 18.78% // Increases project coverage by +12.14% :tada:

Coverage data is based on head (03fb2cc) compared to base (8d4056f). Patch coverage: 62.65% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #159 +/- ## ========================================== + Coverage 6.63% 18.78% +12.14% ========================================== Files 14 21 +7 Lines 1823 2470 +647 Branches 3 3 ========================================== + Hits 121 464 +343 - Misses 1702 2006 +304 ``` | [Impacted Files](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh) | Coverage Δ | | |---|---|---| | [meta/meta-defichain/prometheus/src/sourced.rs](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh#diff-bWV0YS9tZXRhLWRlZmljaGFpbi9wcm9tZXRoZXVzL3NyYy9zb3VyY2VkLnJz) | `0.00% <0.00%> (ø)` | | | [meta/meta-defichain/src/consensus/timestamp.rs](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh#diff-bWV0YS9tZXRhLWRlZmljaGFpbi9zcmMvY29uc2Vuc3VzL3RpbWVzdGFtcC5ycw==) | `0.00% <0.00%> (ø)` | | | [meta/meta-node/src/rpc.rs](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh#diff-bWV0YS9tZXRhLW5vZGUvc3JjL3JwYy5ycw==) | `0.00% <ø> (ø)` | | | [meta/meta-node/src/service.rs](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh#diff-bWV0YS9tZXRhLW5vZGUvc3JjL3NlcnZpY2UucnM=) | `0.00% <0.00%> (ø)` | | | [meta/meta-defichain/src/error.rs](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh#diff-bWV0YS9tZXRhLWRlZmljaGFpbi9zcmMvZXJyb3IucnM=) | `1.50% <5.08%> (ø)` | | | [meta/meta-defichain/src/rpc.rs](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh#diff-bWV0YS9tZXRhLWRlZmljaGFpbi9zcmMvcnBjLnJz) | `13.55% <13.55%> (ø)` | | | [meta/meta-defichain/prometheus/src/lib.rs](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh#diff-bWV0YS9tZXRhLWRlZmljaGFpbi9wcm9tZXRoZXVzL3NyYy9saWIucnM=) | `61.11% <61.11%> (ø)` | | | [meta/meta-defichain/src/finalize\_block.rs](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh#diff-bWV0YS9tZXRhLWRlZmljaGFpbi9zcmMvZmluYWxpemVfYmxvY2sucnM=) | `71.42% <71.42%> (ø)` | | | [meta/meta-defichain/src/seal\_block.rs](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh#diff-bWV0YS9tZXRhLWRlZmljaGFpbi9zcmMvc2VhbF9ibG9jay5ycw==) | `89.55% <89.55%> (ø)` | | | [meta/meta-defichain/src/lib.rs](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh#diff-bWV0YS9tZXRhLWRlZmljaGFpbi9zcmMvbGliLnJz) | `94.97% <94.97%> (ø)` | | | ... and [2 more](https://codecov.io/gh/DeFiCh/metachain/pull/159?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh) | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DeFiCh)

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