docs(addition): add eth brief overview

[JafarAz]

Required for merge:

• pr-workflow-check / draft-release-check is ✅ success
• Other rules GitHub shows you, or can be read in configuration

Makes review faster:

• PR title is my best effort to provide summary of changes and has clear text to be part of release notes
• I marked PR by misc label if it should not be in release notes
• Linked Zenhub/Github/Slack/etc reference if one exists
• I was clear on what type of deployment required to release my changes (node, runtime, contract, indexer, on chain operation, frontend, infrastructure) if any in PR title or description
• Added reviewer into Reviewers
• I tagged(@) or used other form of notification of one person who I think can handle best review of this PR
• I have proved that PR has no general regressions of relevant features and processes required to release into production
• Any dependency updates made, was done according guides from relevant dependency
• Clicking all checkboxes
• Adding detailed description of changes when it feels appropriate (for example when PR is big)

[github-actions]

Pull reviewers stats

Stats of the last 30 days for composable:

	User	Total reviews	Time to review	Total comments
	dzmitry-lahoda	12	1h 11m	6
	blasrodri	7	18h 48m	5
	JafarAz	6	4h 17m	2
	kkast	5	7h 25m	14
	RustNinja	3	1d 10h 30m	0
	mina86	2	13h 53m	0
	fl-y	2	6d 7h 11m	0

[github-actions]

# run Composable node
nix run "github:ComposableFi/composable/refs/pull/4158/merge" --allow-import-from-derivation --extra-experimental-features "flakes nix-command" --no-sandbox --accept-flake-config --option sandbox relaxed

# run local Picasso DevNet (for CosmWasm development)
nix run "github:ComposableFi/composable/refs/pull/4158/merge#devnet-picasso" --allow-import-from-derivation --extra-experimental-features "flakes nix-command" --no-sandbox --accept-flake-config --option sandbox relaxed 

# CosmWasm on Substrate CLI tool
nix run "github:ComposableFi/composable/refs/pull/4158/merge#ccw" --allow-import-from-derivation --extra-experimental-features "flakes nix-command" --no-sandbox --accept-flake-config --option sandbox relaxed 

# run cross chain devnet with Dotsama and Cosmos nodes 
nix run "github:ComposableFi/composable/refs/pull/4158/merge#devnet-xc-fresh" --allow-import-from-derivation --extra-experimental-features "flakes nix-command" --no-sandbox --accept-flake-config --option sandbox relaxed 
# or same with docker
nix build "github:ComposableFi/composable/refs/pull/4158/merge#devnet-xc-image" --allow-import-from-derivation --extra-experimental-features "flakes nix-command" --no-sandbox --accept-flake-config --option sandbox relaxed \
&& docker load --input result && docker run -it --entrypoint bash devnet-xc:latest -c /bin/devnet-xc-fresh 

About nix

[dzmitry-lahoda]

build evm contractrs fails because branch is not on main. after merge or rebase it will be green. this job is not gate for merge. so even with red will merge too. no worries - that is how CI works.