Add Net Asset Value to Markers

[nullpointer0x00]

Description

closes: #1470

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #1640 (119588b) into main (d7598d2) will decrease coverage by 0.02%.
The diff coverage is 67.60%.

❗ Current head 119588b differs from pull request most recent head bdb13b5. Consider uploading reports for the commit bdb13b5 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1640      +/-   ##
==========================================
- Coverage   64.70%   64.68%   -0.02%     
==========================================
  Files         261      245      -16     
  Lines       30937    30611     -326     
==========================================
- Hits        20017    19801     -216     
+ Misses       9657     9544     -113     
- Partials     1263     1266       +3     

Files Changed	Coverage Δ
x/marker/keeper/genesis.go	8.57% <0.00%> (-3.93%)	⬇️
x/marker/keeper/query_server.go	0.00% <0.00%> (ø)
x/marker/types/denom.go	90.52% <ø> (ø)
x/marker/types/events.go	0.00% <0.00%> (ø)
x/marker/types/genesis.go	38.46% <50.00%> (-6.54%)	⬇️
x/marker/keeper/keeper.go	79.41% <68.33%> (-8.75%)	⬇️
x/marker/client/cli/query.go	66.15% <71.42%> (+0.62%)	⬆️
x/marker/keeper/marker.go	56.75% <72.72%> (+0.28%)	⬆️
x/marker/types/msg.go	52.59% <82.35%> (+2.47%)	⬆️
x/marker/client/cli/tx.go	64.05% <86.11%> (+1.51%)	⬆️
... and 4 more

... and 18 files with indirect coverage changes

[Taztingo]

LGTM