feat: lint all files in folder before panicking

[Villaquiranm]

This Pull request intents to follow up on #2011. As said on that Pull request, currently we show all lint errors on the first analyzed file.
If in a folder we have a.gno & b.gno both with lint errors. gno lint | run | test will only find the errors related to one of those files.

This PR aims to show all the lint errors present on the current folder.

Changes:
for lint & test cmd:

• we modified ParseMemPackage function on gnovm/pkg/gnoland/nodes.go. Before this function returned as soon as an error was found while Parsing the gno file. So we introduced an error slice to keep track of all Parse errors. After parsing all the files we panic with the list of errors only if this list is not empty.
• we did the same on parseMemPackageTests function
• create a function printRuntimeError that handles the print of the errors inside catchRuntimeError function. We did this change in order to be able to recursively call the funtion and handle the case of an []error type composed of scanner.ErrorList errors.

Results

• running on gnovm/tests/integ/several-files-multiple/errors
  LINT (before):

several-files-multiple-errors % gno lint .
file2.gno:3: expected 'IDENT', found '{' (code=2).
file2.gno:5: expected type, found '}' (code=2).

LINT (after):

gno lint .
file2.gno:3: expected 'IDENT', found '{' (code=2).
file2.gno:5: expected type, found '}' (code=2).
main.gno:5: expected ';', found example (code=2).
main.gno:6: expected '}', found 'EOF' (code=2).
exit status 1

Contributors' checklist...

• Added new tests, or not needed, or not feasible
• Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• Updated the official documentation or not needed
• No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests
• Added new benchmarks to generated graphs, if any. More info here.

[codecov]

Codecov Report

Attention: Patch coverage is 45.00000% with 11 lines in your changes missing coverage. Please review.

Project coverage is 62.58%. Comparing base (05cd4f5) to head (6db5fdc).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
gnovm/cmd/gno/test.go	20.00%	3 Missing and 1 partial ⚠️
gnovm/pkg/gnolang/nodes.go	20.00%	3 Missing and 1 partial ⚠️
gnovm/cmd/gno/lint.go	70.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2202      +/-   ##
==========================================
- Coverage   63.10%   62.58%   -0.52%     
==========================================
  Files         564      564              
  Lines       79273    83717    +4444     
==========================================
+ Hits        50023    52397    +2374     
- Misses      25886    27824    +1938     
- Partials     3364     3496     +132     

Flag	Coverage Δ
contribs/gnodev	60.00% <ø> (-0.63%)	⬇️
contribs/gnofaucet	14.82% <ø> (-0.95%)	⬇️
gno.land	67.56% <ø> (ø)
gnovm	67.25% <45.00%> (+0.01%)	⬆️
misc/genstd	79.72% <ø> (ø)
misc/logos	19.95% <ø> (ø)
tm2	62.26% <ø> (-0.09%)	⬇️

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