Validate pattern parameters

[uellue]

radius_outer <= radius leads to a zero division error, where the cause may not be clear to users.

search < pattern will lead to a truncated pattern and strange cross-correlation results that are probably not what the user intended. UserTemplate would be the right choice for non-standard patterns.

Contributor Checklist:

• I have added myself to the creators.json file
• [N/A] I have added a changelog entry for my contribution
• I have added/updated documentation for all user-facing changes
• I have added/updated test cases

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 53.90%. Comparing base (13e35ed) to head (e05a97c).

❗ Current head e05a97c differs from pull request most recent head 8c7a163. Consider uploading reports for the commit 8c7a163 to get more accurate results

Files	Patch %	Lines
src/libertem_blobfinder/common/patterns.py	25.00%	6 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #90       +/-   ##
===========================================
- Coverage   86.59%   53.90%   -32.70%     
===========================================
  Files          14       14               
  Lines        1179     1191       +12     
  Branches      165      171        +6     
===========================================
- Hits         1021      642      -379     
- Misses        105      513      +408     
+ Partials       53       36       -17     

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[matbryan52]

I can't open the notebooks right now, but the code and test changes look good.