add support for json-rpc accounts (e.g. metamask) w/ eth_sign

[zeroXbrock]

• detect transport type to determine which signing method to use
  • use eth_sign if wallet is initialized with a custom transport (e.g. window.ethereum)
  • otherwise local account (privateKey) is expected
• add doc-comments for suaveRigil.newWallet and suaveRigil.newPublicClient

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
viem (esm)	57.93 KB (0%)	1.2 s (0%)	1.1 s (-50.65% 🔽)	2.2 s
viem (cjs)	76.48 KB (0%)	1.6 s (0%)	2.5 s (+52.66% 🔺)	4 s
viem (minimal surface - tree-shaking)	3.97 KB (0%)	80 ms (0%)	238 ms (-42.71% 🔽)	317 ms
viem/accounts	89.01 KB (0%)	1.8 s (0%)	1.2 s (-16.22% 🔽)	3 s
viem/accounts (tree-shaking)	19.37 KB (0%)	388 ms (0%)	405 ms (-6.95% 🔽)	793 ms
viem/actions	43.25 KB (0%)	865 ms (0%)	7.7 s (+5.39% 🔺)	8.5 s
viem/actions (tree-shaking)	350 B (0%)	10 ms (0%)	245 ms (-32.87% 🔽)	255 ms
viem/chains	59.89 KB (+0.9% 🔺)	1.2 s (+0.9% 🔺)	1.2 s (-37.53% 🔽)	2.4 s
viem/chains (tree-shaking)	470 B (0%)	10 ms (0%)	798 ms (+73.76% 🔺)	808 ms
viem/chains/utils	7.97 KB (0%)	160 ms (0%)	332 ms (-28.82% 🔽)	492 ms
viem/chains/utils (tree-shaking)	5.24 KB (0%)	105 ms (0%)	565 ms (+59.46% 🔺)	670 ms
viem/ens	43.24 KB (-0.01% 🔽)	865 ms (-0.01% 🔽)	7.7 s (-9.76% 🔽)	8.6 s
viem/ens (tree-shaking)	17.94 KB (0%)	359 ms (0%)	355 ms (-22.78% 🔽)	713 ms

[dmarzzz]

LSTM