Adds necessary shinytest2 helpers for automated tests

[averissimo]

Pull Request

Part of #712

Changes description

• Allow TealAppDriver to be used in tests
  • R6 class is not yet exported from {teal} and needs to be used here
• Adds CDISC simple data helper to use in e2e tests
• Adds skip_if_too_deep function

[github-actions]

Code Coverage Summary

Filename                      Stmts    Miss  Cover    Missing
--------------------------  -------  ------  -------  ------------------------------------
R/tm_a_pca.R                    833     833  0.00%    108-1074
R/tm_a_regression.R             779     779  0.00%    153-1037
R/tm_data_table.R               184     184  0.00%    93-330
R/tm_file_viewer.R              172     172  0.00%    44-250
R/tm_front_page.R               132     121  8.33%    70-226
R/tm_g_association.R            336     336  0.00%    135-543
R/tm_g_bivariate.R              674     412  38.87%   308-775, 816, 927, 944, 962, 973-995
R/tm_g_distribution.R          1056    1056  0.00%    122-1317
R/tm_g_response.R               352     352  0.00%    154-579
R/tm_g_scatterplot.R            728     728  0.00%    230-1059
R/tm_g_scatterplotmatrix.R      284     265  6.69%    165-478, 539, 553
R/tm_missing_data.R            1063    1063  0.00%    92-1311
R/tm_outliers.R                 991     991  0.00%    134-1269
R/tm_t_crosstable.R             257     257  0.00%    141-446
R/tm_variable_browser.R         827     822  0.60%    79-1067, 1105-1289
R/utils.R                        99      96  3.03%    82-267
R/zzz.R                           2       2  0.00%    2-3
TOTAL                          8769    8469  3.42%

Diff against main

Filename      Stmts    Miss  Cover
----------  -------  ------  --------
TOTAL             0       0  +100.00%

Results for commit: 2a24bcc

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[github-actions]

Unit Tests Summary

 1 files   6 suites   0s ⏱️
29 tests 29 ✅ 0 💤 0 ❌
67 runs  67 ✅ 0 💤 0 ❌

Results for commit 2a24bcc.

♻️ This comment has been updated with latest results.

[kartikeyakirar]

LGTM 🚀