feat: Disable opening browser automatically during dev mode

[aklinker1]

This closes #135. New runner.disable field in config.

// wxt.config.ts
export default defineConfig({
  runner: {
    disabled: true,
  },
});

OR

// web-ext.config.ts - should be gitignored
defineRunnerConfig({
  disabled: true
});

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[codecov]

Codecov Report

Merging #136 (cef89b2) into main (e97071b) will decrease coverage by 0.05%.
Report is 1 commits behind head on main.
The diff coverage is 59.09%.

@@            Coverage Diff             @@
##             main     #136      +/-   ##
==========================================
- Coverage   84.52%   84.48%   -0.05%     
==========================================
  Files          50       52       +2     
  Lines        3930     3971      +41     
  Branches      357      361       +4     
==========================================
+ Hits         3322     3355      +33     
- Misses        608      616       +8     

Files	Coverage Δ
src/core/runners/index.ts	100.00% <100.00%> (+62.50%)	⬆️
src/core/types/external.ts	100.00% <100.00%> (ø)
src/core/utils/getInternalConfig.ts	98.02% <100.00%> (+<0.01%)	⬆️
src/core/utils/wsl.ts	42.85% <42.85%> (ø)
src/core/runners/manual.ts	33.33% <33.33%> (ø)

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