Update top level README.md

[fridrik01]

This PR updates our README.md and makes the following changes:

• Rewrite intro to accurately describe BeaconKit as Berachain's consensus client with CometBFT consensus
• Add Proof of Liquidity context
• Add "Key Differences from Ethereum" section
• Add networks table, project structure overview, and development commands
• Remove outdated content (Bera-Geth references, "modular framework" framing, CLI/config reference docs)
• Host banner image locally in .github/assets/ instead of Cloudinary and remove the "A modular framework..." text
• Fix broken links

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.69%. Comparing base (dc15cc5) to head (5415359).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

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  Coverage   62.69%   62.69%           
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  Files         357      357           
  Lines       17226    17226           
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  Hits        10799    10799           
  Misses       5572     5572           
  Partials      855      855           

see 1 file with indirect coverage changes

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[Copilot]

Pull request overview

Updates the top-level README.md to better reflect BeaconKit’s role in the Berachain stack and to provide clearer getting-started and developer workflow guidance.

Changes:

• Rewrites the intro/positioning to describe BeaconKit as Berachain’s consensus client (CometBFT-based consensus).
• Adds network information, quick-start instructions, project structure, and development command references.
• Updates assets/links and removes older/outdated README content.

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[Copilot]

The note that "Network configurations are stored in testing/networks/<chain-id>/" is inaccurate for the local devnet: testing/networks/80087/ does not exist (devnet files live under testing/files/ and other devnet settings are in config/spec/devnet.go). Consider clarifying which networks use testing/networks/* vs the devnet setup so readers don’t look for a non-existent directory.

Suggested change

	Network configurations are stored in `testing/networks/<chain-id>/`.
	Network configurations for public networks (e.g., Mainnet and Bepolia) are stored in `testing/networks/<chain-id>/`. The local devnet (80087) instead uses fixtures in `testing/files/` and configuration in `config/spec/devnet.go`.

[Copilot]

This section says BeaconKit "requires" Bera-Reth, but the repo still includes first-class Geth support (e.g. make start-geth* targets in scripts/build/testing.mk and Kurtosis e2e defaults using ghcr.io/berachain/bera-geth:latest). Either soften the wording (e.g. "recommended" / "supported execution clients") or remove/disable the Geth paths if it’s no longer supported.

Suggested change

	BeaconKit requires [**Bera-Reth**](https://github.com/berachain/bera-reth), a Berachain-specific fork of [Reth](https://github.com/paradigmxyz/reth). Communication happens over the Engine API with JWT authentication.
	BeaconKit is primarily used with [**Bera-Reth**](https://github.com/berachain/bera-reth), a Berachain-specific fork of [Reth](https://github.com/paradigmxyz/reth). Communication happens over the Engine API with JWT authentication.

[calbera]

lgtm