Add CRAN release template

[walkowif]

https://github.com/insightsengineering/idr-tasks/issues/648

[github-actions]

Code Coverage Summary

Filename                 Stmts    Miss  Cover    Missing
---------------------  -------  ------  -------  ---------
R/include_css_js.R           7       7  0.00%    12-20
R/qenv-concat.R             10       0  100.00%
R/qenv-constructor.R        12       0  100.00%
R/qenv-eval_code.R          48       2  95.83%   89, 98
R/qenv-get_code.R           18       0  100.00%
R/qenv-get_var.R            19       0  100.00%
R/qenv-get_warnings.R       24       0  100.00%
R/qenv-join.R               46       0  100.00%
R/qenv-show.R                1       1  0.00%    16
R/utils.R                   19       0  100.00%
TOTAL                      204      10  95.10%

Diff against main

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

Results for commit: a847c46

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[github-actions]

Unit Tests Summary

    1 files      8 suites   1s ⏱️
  66 tests   66 ✔️ 0 💤 0 ❌
144 runs  144 ✔️ 0 💤 0 ❌

Results for commit 214d96c.