chore: extract v1 random beacon to keep-core-v1 repo

[piotr-roslaniec]

Summary

• Move docs-v1/ and solidity-v1/ out of this repo to the new dedicated
  archive threshold-network/keep-core-v1
  (history preserved via git filter-repo, solidity-v1/ renamed to
  solidity/ and docs-v1/ renamed to docs/ inside the archive).
• Strip every live reference to the moved trees in CI, tooling, docs, and
  CODEOWNERS.
• Remove dead Ropsten v1 testnet infrastructure (kube manifests, Cloud
  Function faucet, deployment artifacts, helper scripts, Terraform LB
  resources). Ropsten was deprecated by the Ethereum Foundation in Q4 2022
  and these surfaces have been non-functional ever since; they are tied to
  the v1 KEEP-token operator flow and have no v2 counterpart.

Net diff: ~+35 / ~−190,000 across ~320 file changes.

How the new repo was produced

git clone https://github.com/threshold-network/keep-core.git keep-core-v1
cd keep-core-v1
git filter-repo \
  --path docs-v1 --path solidity-v1 \
  --path-rename docs-v1/:docs/ \
  --path-rename solidity-v1/:solidity/
# + add top-level archive README and carry LICENSE from keep-core
git remote add origin git@github.com:threshold-network/keep-core-v1.git
git push -u origin main --tags

Result: 595 commits and 33 tags preserved in the new repo. Blame/log
inside the moved paths remain intact (SHAs differ due to the rewrite).

What changed in this repo

Removed — v1 source trees:

• docs-v1/ (1.2 MB legacy v1 specs / RFCs)
• solidity-v1/ (3.7 MB legacy v1 contracts)
• scripts/install-v1.sh (only set up v1 truffle migrations)
• crytic-config.json (only contained {\"cwd\": \"solidity-v1\"})

Removed — dead Ropsten v1 infrastructure:

• infrastructure/eth-networks/keep-test/ropsten/ (3.1 MB of v1
  KeepToken / TokenStaking / KeepRandomBeaconOperator deployment
  JSONs plus 8 participant configs and keyfiles)
• infrastructure/eth-networks/scripts/ (stake-accounts.js,
  fetch-contract-data.sh, prepare-participant-bundles.sh,
  create-eth-accounts.sh, and their package.json / package-lock.json
  pulling in @truffle/hdwallet-provider)
• infrastructure/gcp/keep-test/google-functions/keep-faucet/ (Ropsten
  KEEP-token grant faucet Cloud Function targeting the
  long-deprecated nodejs10 runtime)
• 11 Ropsten-specific Kubernetes manifests under
  infrastructure/kube/keep-dev/ (eth-miner-ropsten-*,
  eth-tx-ropsten-*, eth-network-ropsten-configmap)
• Ropsten load-balancer resources, variables and outputs in
  infrastructure/terraform/keep-dev/

Preserved

• docs-v1/development/go-guidelines.adoc moved to
  docs/development/go-guidelines.adoc -- it documents Go style for
  code that still lives in this repo, not in v1.

Updated references

• CODEOWNERS -- dropped 33 /solidity-v1/... patterns.
• .github/workflows/client.yml -- removed v1 entries from
  paths-ignore and the path-filter expression.
• .pre-commit-config.yaml -- removed lint-js-v1, lint-sol-v1,
  format-dashboard, and lint-faucet-js hooks.
• scripts/macos-setup.sh -- dropped the cd ../solidity-v1 && npm install
  step, kept generic brew install npm (v2 contracts still need it).
• .dockerignore -- dropped solidity-v1/, the stale crytic-config.json
  exclusion (file deleted), and the dead !pkg/chain/gen allowlist (path
  doesn't exist; v2 bindings live under pkg/chain/ethereum/*/gen/).
• README.adoc -- rewrote the "Moving to a new random beacon" and
  "dApp Developers" sections and the directory-structure tree to point
  at threshold-network/keep-core-v1; renumbered tree callouts.
• docs/retired-components.md -- reworded to clarify that retired files
  (TokenStakingEscrow.sol, withdraw-old-rewards.js, dashboard/) appear
  only in the history of keep-core-v1, not in its current tree.
• docs/development/README.adoc -- link now targets the local copy of
  go-guidelines.adoc.
• solidity/random-beacon/README.adoc -- "Prior Work" link points at
  the new repo.

Intentionally left untouched

• solidity/random-beacon/contracts/libraries/BytesLib.sol keeps a
  permalink-by-commit-SHA pointer to the original v1 BytesLib in
  keep-network/keep-core. That URL stays valid forever.
• solidity/random-beacon/deployments/** and
  solidity/ecdsa/deployments/** JSONs contain embedded solc metadata
  mentioning solidity-v1 paths -- immutable deployment artifacts.
• Go module path github.com/keep-network/keep-core (go.mod, all Go
  imports, Dockerfile workdir, GitHub Actions workdir): the GitHub-org
  rename doesn't force a module-path change and that's a separate
  decision out of scope for this PR.
• npm package name @keep-network/keep-core referenced by v2 yarn.lock
  files -- registry name can't be renamed without republishing.
• Pre-existing keep-network/keep-core/... URLs in badges, fork
  instructions, etc. -- they predate the org migration and are out of
  scope for this PR.

Out-of-scope follow-ups (NOT addressed here)

• infrastructure/eth-networks/private-testnet/ is a Görli-era v2
  Staking-Provider bundle generator. Görli was also deprecated in
  early 2024, but the tree is v2-aware so deleting it belongs to a
  separate testnet-cleanup PR.
• solidity/random-beacon/.hardhat/networks_TEMPLATE.ts still lists a
  Ropsten entry inside a v2 hardhat config template.

Test plan

• pre-commit run --all-files passes (v1/faucet hooks removed; v2 +
  remaining hooks unchanged).
• Client workflow path-filter still triggers correctly on a real
  Go-touching PR and skips on docs/solidity-only PRs.
• Docker build still succeeds (.dockerignore correctness, dead
  !pkg/chain/gen allowlist removed).
• README.adoc AsciiDoc renders cleanly (tree callouts renumbered).
• terraform plan against infrastructure/terraform/keep-dev/ shows
  a delete of the two Ropsten google_compute_address resources and
  no other unexpected drift.