Replace TealData with teal_data in the vignettes + Using teal_data_module

[vedhav]

Replace all instances of TealData in the vignettes with teal_data and write about how teal_data works especially about the within()

Vignettes affected:

• Data in teal application. Let's create one vignette to replace former ones: vignette data #990
  • preprocessing-data.Rmd @chlebowa
  • including-adam-data-in-teal.Rmd @chlebowa
  • including-general-data-in-teal.Rmd @chlebowa
  • including-mae-data-in-teal.Rmd @chlebowa
• creating-custom-modules.Rmd use teal_data instead of tdata @chlebowa vignette custom modules #980
• filter-panel.Rmd (data and filter arguments) @chlebowa vignette filter panel #981
• adding-support-for-reporting.Rmd use teal_data instead of tdata @chlebowa vignette reporting #979
• teal-bs-themes.Rmd @chlebowa vignette themes #978

Extra:

• teal.Rmd has out-of-date picture of the filter panel @chlebowa vignette introduction #977

Assign yourself to single bulletpoint and make a PR for each file.

[chlebowa]

If the issue is "In Review", please link the corresponding pull requests.