add download arware and get last rollup tx in ar toolbox

[jingchen2222]

Change

• Add download arware file
• support API to get last rollup tx

---

PR-Codex overview

This PR focuses on adding new functionality and improving error handling for arware operations.

Detailed summary

• Added ArwareOpError error type.
• Added ArwareOpError variant to existing error handling code.
• Added new function download_and_parse_record_batch to download and parse record batches.
• Added new function get_prev_arware_tx to get the previous arware transaction.
• Updated existing functions to use ArwareOpError where necessary.

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

[imotai]

LGTM

[codecov-commenter]

Codecov Report

Merging #533 (b2eb631) into main (cab7f67) will increase coverage by 1.40%.
The diff coverage is 79.95%.

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@@            Coverage Diff             @@
##             main     #533      +/-   ##
==========================================
+ Coverage   54.37%   55.77%   +1.40%     
==========================================
  Files          71       72       +1     
  Lines       13700    14090     +390     
  Branches       61       61              
==========================================
+ Hits         7449     7859     +410     
+ Misses       6251     6231      -20     

Flag	Coverage Δ
rust	55.77% <79.95%> (+1.40%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/error/src/lib.rs	100.00% <ø> (ø)
src/node/src/rollup_executor.rs	30.94% <57.14%> (+3.79%)	⬆️
src/storage/src/ar_fs.rs	53.65% <65.45%> (+16.70%)	⬆️
src/node/src/ar_toolbox.rs	83.28% <83.28%> (ø)

... and 9 files with indirect coverage changes

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