feat: Default to file explorer for the first time UX

[RulaKhaled]

Description

if first pull request, default to file explorer.

Changes

• Update pulls page to default to file explorer for the first pull request
• Tests

issue: codecov/engineering-team#404

Legal Boilerplate

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. In 2022 this entity acquired Codecov and as result Sentry is going to need some rights from me in order to utilize my contributions in this PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

[codecov-staging]

Codecov Report

Merging #2289 (ec8100f) into main (d1e1888) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #2289   +/-   ##
=======================================
  Coverage   98.03%   98.03%           
=======================================
  Files         703      703           
  Lines        8151     8154    +3     
  Branches     1965     1923   -42     
=======================================
+ Hits         7991     7994    +3     
  Misses        158      158           
  Partials        2        2           

Files	Coverage Δ
...PullRequestPageContent/ErrorBanner/ErrorBanner.jsx	100.00% <ø> (ø)
.../PullRequestPageContent/PullRequestPageContent.jsx	100.00% <ø> (ø)
.../pages/RepoPage/PullsTab/PullsTable/PullsTable.jsx	100.00% <ø> (ø)
...pages/RepoPage/PullsTab/PullsTable/Title/Title.jsx	100.00% <100.00%> (ø)
src/shared/utils/comparison.js	100.00% <ø> (ø)

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d1e1888...ec8100f. Read the comment docs.

[codecov]

Codecov Report

Merging #2289 (ec8100f) into main (d1e1888) will not change coverage.
The diff coverage is 100.00%.

@@          Coverage Diff          @@
##            main   #2289   +/-   ##
=====================================
  Coverage   98.04   98.04           
=====================================
  Files        703     703           
  Lines       8151    8154    +3     
  Branches    1965    1968    +3     
=====================================
+ Hits        7991    7994    +3     
  Misses       158     158           
  Partials       2       2           

Files	Coverage Δ
...PullRequestPageContent/ErrorBanner/ErrorBanner.jsx	100.00% <ø> (ø)
.../PullRequestPageContent/PullRequestPageContent.jsx	100.00% <ø> (ø)
.../pages/RepoPage/PullsTab/PullsTable/PullsTable.jsx	100.00% <ø> (ø)
...pages/RepoPage/PullsTab/PullsTable/Title/Title.jsx	100.00% <100.00%> (ø)
src/shared/utils/comparison.js	100.00% <ø> (ø)

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d1e1888...ec8100f. Read the comment docs.

[codecov-public-qa]

Codecov Report

Merging #2289 (ec8100f) into main (587432e) will increase coverage by 0.02%.
Report is 1 commits behind head on main.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #2289      +/-   ##
==========================================
+ Coverage   34.58%   34.60%   +0.02%     
==========================================
  Files         655      655              
  Lines        8015     8010       -5     
  Branches     1920     1921       +1     
==========================================
  Hits         2772     2772              
+ Misses       5220     5215       -5     
  Partials       23       23              

Files Changed	Coverage Δ
src/App.jsx	0.00% <ø> (ø)
src/layouts/BaseLayout/hooks/useUserAccessGate.js	0.00% <0.00%> (ø)
src/pages/LoginPage/LoginButton.jsx	0.00% <ø> (ø)
src/pages/LoginPage/LoginPage.jsx	0.00% <ø> (ø)
...PullRequestPageContent/ErrorBanner/ErrorBanner.jsx	0.00% <ø> (ø)
.../PullRequestPageContent/PullRequestPageContent.jsx	0.00% <ø> (ø)
.../pages/RepoPage/PullsTab/PullsTable/PullsTable.jsx	0.00% <ø> (ø)
...pages/RepoPage/PullsTab/PullsTable/Title/Title.jsx	0.00% <0.00%> (ø)
src/pages/SyncProviderPage/SyncProviderPage.tsx	0.00% <0.00%> (ø)
src/shared/utils/comparison.js	0.00% <ø> (ø)

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d1e1888...ec8100f. Read the comment docs.

[netlify]

✅ Deploy Preview for gazebo-staging ready!

Name	Link
🔨 Latest commit	ec8100f
🔍 Latest deploy log	https://app.netlify.com/sites/gazebo-staging/deploys/65140a46eef56c0008feaaaa
😎 Deploy Preview	https://deploy-preview-2289--gazebo-staging.netlify.app/
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.