feat: Add new default dashboard

[betodealmeida]

SUMMARY

This PR adds a new dashboard showing sales of vehicles. It uses the new import/export framework for examples (see #12026), and required adding more types for the data import, as well as quarterly time grain to the Sqlite engine spec.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TEST PLAN

Installed Superset from scratch, dashboard is imported correctly (see screenshots) together with all assets (charts, dataset and data).

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

[amitmiran137]

I must say this looks super elegent

[betodealmeida]

I must say this looks super elegent

Props to @srinify for that! :)

[codecov-io]

Codecov Report

Merging #12044 (63b71c8) into master (5e811a1) will decrease coverage by 6.72%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master   #12044      +/-   ##
==========================================
- Coverage   66.95%   60.23%   -6.73%     
==========================================
  Files         957      912      -45     
  Lines       47003    44981    -2022     
  Branches     4589     4059     -530     
==========================================
- Hits        31471    27093    -4378     
- Misses      15404    17888    +2484     
+ Partials      128        0     -128     

Flag	Coverage Δ
cypress	53.13% <ø> (+4.48%)	⬆️
javascript	?
python	64.04% <50.00%> (-0.31%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
superset/db_engine_specs/sqlite.py	65.62% <ø> (-9.38%)	⬇️
superset/datasets/commands/importers/v1/utils.py	58.62% <50.00%> (+2.68%)	⬆️
...uperset-frontend/src/dashboard/util/dnd-reorder.js	0.00% <0.00%> (-100.00%)	⬇️
...rset-frontend/src/dashboard/util/getEmptyLayout.js	0.00% <0.00%> (-100.00%)	⬇️
...dashboard/components/resizable/ResizableHandle.jsx	0.00% <0.00%> (-100.00%)	⬇️
.../src/dashboard/util/getFilterScopeFromNodesTree.js	0.00% <0.00%> (-93.48%)	⬇️
...set-frontend/src/views/CRUD/alert/ExecutionLog.tsx	11.76% <0.00%> (-88.24%)	⬇️
...src/dashboard/components/gridComponents/Header.jsx	10.52% <0.00%> (-86.85%)	⬇️
...rc/dashboard/components/gridComponents/Divider.jsx	13.33% <0.00%> (-86.67%)	⬇️
...ontend/src/dashboard/util/getDashboardFilterKey.ts	14.28% <0.00%> (-85.72%)	⬇️
... and 363 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5e811a1...63b71c8. Read the comment docs.

[hughhhh]

Dope!!!!!