fix(collector): change withdraw function to entry function

[matchv]

• Change withdraw function from public fun to public entry fun
• Allows funds admin to directly call the function via wallet/CLI
• Maintains existing permission checks and functionality
• Addresses security concern about admin accessibility

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.08%. Comparing base (566c23b) to head (0a9c347).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #36   +/-   ##
=======================================
  Coverage   97.08%   97.08%           
=======================================
  Files          16       16           
  Lines         514      514           
=======================================
  Hits          499      499           
  Misses         15       15           

Flag	Coverage Δ
move	97.08% <ø> (ø)

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[mpsc0x]

@matchv Approved, but could you link to the issue tackled in here. In general its better to have in exposed as it would otherwise only allow scripts to call it.