Choose install version

[scottbot95]

Most directly this resolves #90 by adding a drop down to each row to choose which version you wish to install. You may also click on the version in the details panel to have it mark that version for install.

This also fixes #95. I made it so that it no longer deletes config files on uninstall of BepInExPack

[codecov-io]

Codecov Report

Merging #96 into master will decrease coverage by 1.03%. The diff coverage is 35.08%.

@@            Coverage Diff            @@
##           master     #96      +/-   ##
=========================================
- Coverage   58.73%   57.7%   -1.04%     
=========================================
  Files          36      36              
  Lines        1316    1369      +53     
  Branches       77      85       +8     
=========================================
+ Hits          773     790      +17     
- Misses        525     560      +35     
- Partials       18      19       +1

Impacted Files	Coverage Δ
src/app/core/models/package.model.ts	97.72% <0%> (-2.28%)	:arrow_down:
...selection/packages-page/packages-page.component.ts	68.88% <0%> (ø)	:arrow_up:
src/app/profile/services/profile.service.ts	38.66% <0%> (ø)	:arrow_up:
src/app/shared/shared.module.ts	100% <100%> (ø)	:arrow_up:
src/app/app.component.ts	100% <100%> (ø)	:arrow_up:
src/app/core/services/electron.service.ts	71.42% <20%> (-11.19%)	:arrow_down:
...selection/package-table/package-table.component.ts	43.63% <23.63%> (-4.88%)	:arrow_down:
src/app/main/services/package.service.ts	35.67% <35%> (+2.34%)	:arrow_up:
...ction/packages-page/step-two/step-two.component.ts	94.44% <50%> (-5.56%)	:arrow_down:
...in/config-editor/services/config-parser.service.ts	58.42% <50%> (ø)	:arrow_up:
... and 5 more

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