Fix copilot-setup-steps: replace reusable workflow with direct steps

[m7pr]

This PR fixes the GitHub Copilot setup workflow by replacing the reusable workflow call with direct steps, as required by GitHub Copilot's limitations for copilot-setup-steps jobs.

Changes:

• Removed uses: insightsengineering/r.pkg.template/.github/workflows/copilot-setup-steps.yaml@main
• Added direct steps for checkout, R setup, and dependency installation
• Uses actions with uses: (which is allowed) instead of reusable workflows (which are not)

This resolves the error: 'Calling a reusable workflow with the uses: keyword is not supported in copilot-setup-steps jobs.'

[github-actions]

Unit Tests Summary

  1 files   24 suites   15m 53s ⏱️
167 tests 162 ✅ 5 💤 0 ❌
483 runs  478 ✅ 5 💤 0 ❌

Results for commit bd84a91.

♻️ This comment has been updated with latest results.

[github-actions]

Unit Test Performance Difference

Test Suite	$Status$	Time on main	$±Time$	$±Tests$	$±Skipped$	$±Failures$	$±Errors$
shinytest2-tm_a_pca	💔	$146.44$	$+1.66$	$0$	$0$	$0$	$0$
shinytest2-tm_g_bivariate	💔	$91.66$	$+1.13$	$0$	$0$	$0$	$0$
shinytest2-tm_t_crosstable	💔	$38.02$	$+1.63$	$0$	$0$	$0$	$0$

Results for commit eb55f19

♻️ This comment has been updated with latest results.

[github-actions]

Code Coverage Summary

Filename                      Stmts    Miss  Cover    Missing
--------------------------  -------  ------  -------  -------------------------------------------
R/geom_mosaic.R                  73      73  0.00%    37-225
R/tm_a_pca.R                    864     864  0.00%    141-1132
R/tm_a_regression.R             751     751  0.00%    180-1027
R/tm_data_table.R               200     200  0.00%    100-348
R/tm_file_viewer.R              172     172  0.00%    50-257
R/tm_front_page.R               143     132  7.69%    77-246
R/tm_g_association.R            320     320  0.00%    161-547
R/tm_g_bivariate.R              672     408  39.29%   332-788, 829, 940, 957, 975, 986-1008
R/tm_g_distribution.R          1106    1106  0.00%    156-1404
R/tm_g_response.R               345     345  0.00%    179-594
R/tm_g_scatterplot.R            709     709  0.00%    261-1065
R/tm_g_scatterplotmatrix.R      272     253  6.99%    200-501, 562, 576
R/tm_missing_data.R            1172    1172  0.00%    126-1475
R/tm_outliers.R                1029    1029  0.00%    162-1341
R/tm_rmarkdown.R                154      68  55.84%   144-196, 225-240, 284-285, 345-368
R/tm_t_crosstable.R             263     263  0.00%    177-482
R/tm_variable_browser.R         887     881  0.68%    89-1113, 1164-1347
R/utils.R                       185     120  35.14%   87-250, 279-305, 317-326, 331, 345-364, 453
R/zzz.R                           2       2  0.00%    2-3
TOTAL                          9319    8868  4.84%

Diff against main

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

Results for commit: bd84a91

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results