Update bootstrap vignette

[asbates]

Updates the bootstrap theming vignette to add more details on using bslib::run_with_themer to customize a teal application theme. Includes screenshots for each step as well as explanation of how to apply the new theme.

Fixes #738

[github-actions]

Unit Tests Summary

    1 files    13 suites   14s ⏱️
145 tests 145 ✔️ 0 💤 0 ❌
287 runs  287 ✔️ 0 💤 0 ❌

Results for commit 866989f.

♻️ This comment has been updated with latest results.

[github-actions]

Code Coverage Summary

Filename                         Stmts    Miss  Cover    Missing
-----------------------------  -------  ------  -------  ------------------------------
R/dummy_functions.R                 74      61  17.57%   12-95
R/example_module.R                  18       9  50.00%   23-26, 29-33
R/get_rcode_utils.R                 52       2  96.15%   94, 99
R/get_rcode.R                      137      54  60.58%   74, 81, 86, 211-277
R/include_css_js.R                  24       0  100.00%
R/init.R                            22       2  90.91%   188-189
R/module_nested_tabs.R             130       7  94.62%   57, 96, 101-102, 148, 198, 227
R/module_tabs_with_filters.R        68       1  98.53%   162
R/module_teal_with_splash.R         33       2  93.94%   65, 77
R/module_teal.R                    111       5  95.50%   49, 52, 155-156, 180
R/modules_debugging.R               18      18  0.00%    37-56
R/modules.R                        101       8  92.08%   341-366
R/reporter_previewer_module.R       12       2  83.33%   18, 22
R/show_rcode_modal.R                20      20  0.00%    17-38
R/tdata.R                           41       2  95.12%   146, 172
R/utils.R                           13       0  100.00%
R/validate_inputs.R                 21       0  100.00%
R/validations.R                     62      39  37.10%   107-368
R/zzz.R                             11       7  36.36%   3-14
TOTAL                              968     239  75.31%

Diff against main

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

Results for commit: a5ef518

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[donyunardi]

The contents are good.
One small request, can we do a better circle annotation on the images/screenshots?
In Mac, I could do this using Preview.
I think in Windows you can do something like MS Paint?

[asbates]

The contents are good. One small request, can we do a better circle annotation on the images/screenshots? In Mac, I could do this using Preview. I think in Windows you can do something like MS Paint?

You don't like my masterful hand drawing? :). Do these new images look better?