fix: add flag for logging in with device flow on CLI, fix broken sigint handling during auth

[brandonskiser]

Description of changes:

• Adding a flag to always use device code flow for q login. This is useful in cases where we think we can open a browser successfully, but are actually unable to handle redirects required for PKCE.
• Fixing sigint handling to actually respect ctrl+c

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.

Project coverage is 14.34%. Comparing base (da59663) to head (a6ba825).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/q_cli/src/cli/user.rs	0.00%	12 Missing ⚠️
crates/q_cli/src/cli/installation.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1349      +/-   ##
==========================================
- Coverage   14.36%   14.34%   -0.02%     
==========================================
  Files        2368     2368              
  Lines      206348   206350       +2     
  Branches   186712   186714       +2     
==========================================
- Hits        29633    29605      -28     
- Misses     175257   175289      +32     
+ Partials     1458     1456       -2     

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[GoodluckH]

#1390