feat(runner): Solidity & Flow EVM support

[lmcmz]

Summary

Adds dual-language (Cadence + Solidity) support to the Runner IDE, replacing the outdated PR #159 with a clean reimplementation on current main.

• Server-side Solidity LSP — solidity-language-server (Rust binary) via /lsp-sol WebSocket, mirroring existing Cadence LSP pattern
• Multi-language editor — Monaco auto-detects .sol vs .cdc, parameterized LSP adapter, Solidity syntax highlighting
• EVM wallet — wagmi + viem with Flow EVM chains (mainnet 747, testnet 545), dual wallet UI (Flow + EVM), local key EOA support
• Client-side Solidity compilation — solc WASM in browser, context-aware run button (orange "Compile" for .sol, green "Run" for .cdc)
• Solidity templates — Simple Storage, ERC-20 Token, Cross-VM (Cadence ↔ EVM)

Architecture

Frontend:  CadenceEditor (auto language) → useLsp / useSolidityLsp → MonacoLspAdapter(languageId)
Wallet:    FCL + LocalKey (Cadence) | wagmi + viem (EVM) — both via LocalKey EOA
Compile:   solc WASM (browser-side) → ABI + bytecode
Server:    /lsp → Cadence LSP (port 3002) | /lsp-sol → Solidity LSP (port 3004)
Docker:    solidity-language-server v0.1.32 binary added

New files

• runner/server/src/solidityLspClient.ts — Solidity LSP client (stdio JSON-RPC)
• runner/src/editor/useSolidityLsp.ts — Solidity LSP React hook
• runner/src/flow/evmChains.ts — Flow EVM chain definitions
• runner/src/flow/wagmiConfig.ts — wagmi config
• runner/src/flow/evmExecute.ts — solc WASM compile module
• runner/src/types/solc.d.ts — solc type declaration

Modified files

• runner/server/src/index.ts — add /lsp-sol WebSocket handler
• runner/nginx.conf — add /lsp-sol proxy
• runner/Dockerfile — add solidity-language-server binary
• runner/src/editor/monacoLspAdapter.ts — parameterize language ID
• runner/src/editor/CadenceEditor.tsx — language-aware for .sol
• runner/src/fs/fileSystem.ts — Solidity templates
• runner/src/components/FileExplorer.tsx — .sol file icons
• runner/src/components/WalletButton.tsx — dual wallet (Flow + EVM)
• runner/src/auth/localKeyManager.ts — EVM EOA derivation
• runner/src/main.tsx — WagmiProvider wrapper
• runner/src/App.tsx — Solidity LSP + compile handler + run routing

Test plan

• Open runner, verify existing Cadence templates work unchanged
• Create "Simple Storage (Solidity)" from template picker
• Verify .sol file has syntax highlighting and blue icon
• Click "Compile" — verify compilation output in result panel
• Connect MetaMask to Flow EVM testnet — verify dual wallet shows EVM address
• Switch to .cdc file — verify button switches back to green "Run"
• Try "Cross-VM" template — verify both .sol and .cdc files present

Notes

• Replaces outdated PR feat(runner): Solidity & Flow EVM support (Phase 1 + 2) #159 (too many conflicts to merge)
• solc WASM produces a ~9.6MB chunk — could lazy-load on first .sol open in future
• Deploy via viem not yet wired (compile-only for now) — will add in follow-up

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