🐛 Depot bug fix

[NaitikRambhia]

Summary:

Wrapped pickle.pickler in a Try, Except. Prompted user to reset depots using the reset depots function.

Motivation:

Prevents an error message after having a malformed depot.

References (optional):

Closes #342

Test Plan:

With npm installed:
powershell:

mkdir depot;
'[{"py/object":"pros.conductor.templates.base_template.BaseTemplate","metadata":{},"name":""}]' | Out-File -FilePath ./depot/depot.json ascii;
Start-Process npx -ArgumentList "-y http-server depot -p 8080";
sleep 6;
pros c add-depot malformed http://127.0.0.1:8080/depot.json;
pros c query-templates --force-refresh some-text;
pros --version

not windows:

mkdir depot 
echo '[{"py/object":"pros.conductor.templates.base_template.BaseTemplate","metadata":{},"name":""}]' >./depot/depot.json 
npx -y http-server depot -p 8080 & 
sleep 6
pros c add-depot malformed http://127.0.0.1:8080/depot.json
pros c query-templates --force-refresh some-text
pros --version

[meisZWFLZ]

Shouldn't changes to the conductor.pros file be checked to ensure they create valid json, preventing the file from being malformed in the first place?

[BennyBot]

Ideally, yes, they should be. However, this does not prevent a user from going and modifying it themselves. Therefore, this check should be in there anyways.