fix: improve extension installing UX and support unstall

[erha19]

Types

• 🐛 Bug Fixes

Background or solution

close #1845.

Kapture.2022-10-26.at.17.44.52.mp4

Changelog

improve extension installing UX and support unstall

[codecov]

Codecov Report

Base: 57.57% // Head: 57.56% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (1c12e41) compared to base (69ba8b8).
Patch coverage: 10.63% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1855      +/-   ##
==========================================
- Coverage   57.57%   57.56%   -0.02%     
==========================================
  Files        1285     1285              
  Lines       80236    80275      +39     
  Branches    16811    16818       +7     
==========================================
+ Hits        46196    46207      +11     
- Misses      30961    30986      +25     
- Partials     3079     3082       +3     

Flag	Coverage Δ
jsdom	52.31% <10.63%> (-0.02%)	⬇️
node	15.89% <4.25%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...nsion-manager/src/browser/vsx-extension.service.ts	0.00% <0.00%> (ø)
packages/extension-manager/src/common/index.ts	0.00% <ø> (ø)
packages/i18n/src/common/en-US.lang.ts	100.00% <ø> (ø)
packages/i18n/src/common/zh-CN.lang.ts	100.00% <ø> (ø)
...nsion/src/browser/extension-instance-management.ts	62.68% <50.00%> (-1.83%)	⬇️
packages/core-common/src/const/application.ts	100.00% <100.00%> (ø)
packages/extension/src/browser/types.ts	100.00% <100.00%> (ø)
packages/task/src/common/index.ts	100.00% <0.00%> (ø)
packages/terminal-next/src/common/index.ts	100.00% <0.00%> (ø)
...nal-next/src/browser/contribution/terminal.menu.ts	0.00% <0.00%> (ø)
... and 6 more

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[yantze]

LGTM

[erha19]

close #1836.