chore: improve error message of path traversing

[qweeah]

What this PR does / why we need it:
This PR provides detailed instruction to user on how to handle path traversing error during pulling.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #978

Please check the following list:

• Does the affected code have corresponding tests, e.g. unit test, E2E test?
• Does this change require a documentation update?
• Does this introduce breaking changes that would require an announcement or bumping the major version?
• Do all new files have an appropriate license header?

[codecov-commenter]

Codecov Report

Merging #979 (a05ce01) into main (22a7316) will decrease coverage by 0.10%.
The diff coverage is 0.00%.

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@@            Coverage Diff             @@
##             main     #979      +/-   ##
==========================================
- Coverage   81.08%   80.99%   -0.10%     
==========================================
  Files          53       53              
  Lines        2776     2778       +2     
==========================================
- Hits         2251     2250       -1     
- Misses        356      358       +2     
- Partials      169      170       +1     

Impacted Files	Coverage Δ
cmd/oras/root/pull.go	73.62% <0.00%> (-1.38%)	⬇️

[qweeah]

Making this a draft since #980 might be a better option.