Vin.txid to be decoded in BE order

[fuxingloh]

What kind of PR is this?:

/kind chore

What this PR does / why we need it:

Vin.txid to be decoded in BE order but re-encoded as LE. This is for consistency with defid, see #231

Which issue(s) does this PR fixes?:

Fixes #231

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
packages/jellyfish/dist/jellyfish.umd.js	18.93 KB (0%)	379 ms (0%)	168 ms (-1.19% 🔽)	547 ms

[codecov]

Codecov Report

Merging #250 (73221ff) into main (7894dd2) will decrease coverage by 0.08%.
The diff coverage is 84.61%.

@@            Coverage Diff             @@
##             main     #250      +/-   ##
==========================================
- Coverage   96.46%   96.37%   -0.09%     
==========================================
  Files          82       82              
  Lines        2148     2151       +3     
  Branches      274      274              
==========================================
+ Hits         2072     2073       +1     
- Misses         76       78       +2     

Impacted Files	Coverage Δ
...ckages/jellyfish-transaction/src/script/mapping.ts	95.00% <0.00%> (-3.28%)	⬇️
...ellyfish-transaction/src/buffer/buffer_composer.ts	99.37% <100.00%> (ø)
packages/jellyfish-transaction/src/tx_composer.ts	78.57% <100.00%> (ø)
packages/jellyfish-transaction/src/tx_segwit.ts	100.00% <100.00%> (ø)
packages/jellyfish-transaction/src/tx_signature.ts	97.77% <100.00%> (+0.02%)	⬆️

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