feat: introduce the stacks-codec component

[hugocaillard]

Description

• introduce a stacks-codec component, extracting the codec that was in clarity-repl
• making stacks-rpc-client lighter by not pulling the whole clarity-repl component but just stacks-codec
• making chainhook-sdk lighter by not pulling the whole stacks-rpc-client component but just stacks-codec
• remove the default values for PoxInfo

This goes in pair with https://github.com/hirosystems/chainhook/pull/542

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 40.91%. Comparing base (175103e) to head (3e81431).

:exclamation: Current head 3e81431 differs from pull request most recent head c796160. Consider uploading reports for the commit c796160 to get more accurate results

Files	Patch %	Lines
...omponents/stacks-network/src/chains_coordinator.rs	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1399 +/- ## ========================================== + Coverage 40.87% 40.91% +0.04% ========================================== Files 87 87 Lines 32562 32519 -43 ========================================== - Hits 13309 13305 -4 + Misses 19253 19214 -39 ```

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[lgalabru]

Address https://github.com/hirosystems/clarinet/issues/1038