fix: remove prepublishOnly from @hyperlane-xyz/core

The prepublishOnly script re-ran `pnpm build && pnpm build:zk &&
pnpm build:tron` inside `changeset publish`, causing EPIPE crashes when
hardhat tried to compile solidity 0.8.33 in the resource-constrained
publish subprocess. This was redundant since the release workflow already
runs `pnpm build` before publishing.

Replace with a `prepack` guard that just verifies dist/ exists. Move
build:zk and build:tron into the release script and beta workflow so
they run once, before publish, not inside it.

Author: paulbalaji

package.json

@@ -17,7 +17,7 @@
     "coverage": "turbo run coverage",
     "version:prepare": "pnpm changeset version && turbo run version:update && pnpm install",
     "version:check": "pnpm changeset status",
-    "release": "pnpm build && pnpm changeset publish",
+    "release": "pnpm build && pnpm build:zk && pnpm changeset publish",
     "spellcheck": "typos --config .spellcheck/typos.toml",
     "spellcheck:diff": "bash .spellcheck/run-diff.sh",
     "postinstall": "husky install"

solidity/package.json

@@ -74,7 +74,7 @@
     "build:zk": "pnpm hardhat-zk compile && tsc && node fix-typechain-ethers.mjs ./dist/typechain/factories && node generate-artifact-exports.mjs && ZKSYNC=true ./exportBuildArtifact.sh",
     "build:tron": "./build-tron.sh",
     "test:tron": "FOUNDRY_PROFILE=tron forge test --match-contract 'Tron(Create2|SafeERC20)Test' -vvv && bash test/tron/check-SafeERC20-diff.sh",
-    "prepublishOnly": "pnpm build && pnpm build:zk && pnpm build:tron",
+    "prepack": "[ -d dist ] || (echo 'Error: dist/ not found. Run pnpm build first.' && exit 1)",
     "lint": "solhint contracts/**/*.sol",
     "clean": "pnpm hardhat-esm clean && pnpm hardhat-zk clean && rm -rf ./dist ./cache ./cache-zk ./cache-tron ./artifacts-tron ./out-tron ./forge-cache-tron ./types ./coverage ./out ./forge-cache ./fixtures",
     "coverage": "pnpm fixtures && ./coverage.sh",