feat(app)!: add group module

[aleem1314]

Description

Closes: #378

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Author Checklist

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I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

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your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[aleem1314]

group module default-config.

[ryanchristo]

Defaults look good to me.

[ryanchristo]

Looking good. One question about the added migration test.

[codecov]

Codecov Report

Merging #1340 (a3c33fc) into master (682e4de) will decrease coverage by 0.32%.
The diff coverage is 62.97%.

❗ Current head a3c33fc differs from pull request most recent head 7b32cc6. Consider uploading reports for the commit 7b32cc6 to get more accurate results

@@            Coverage Diff             @@
##           master    #1340      +/-   ##
==========================================
- Coverage   77.45%   77.12%   -0.33%     
==========================================
  Files         221      213       -8     
  Lines       16120    15464     -656     
==========================================
- Hits        12486    11927     -559     
- Misses       2620     2625       +5     
+ Partials     1014      912     -102     

Flag	Coverage Δ
experimental-codecov	?
stable-codecov	?

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

Impacted Files	Coverage Δ
app/export.go	10.20% <0.00%> (+0.40%)	⬆️
app/regen/cmd/genaccounts.go	15.15% <0.00%> (-0.98%)	⬇️
app/regen/cmd/testnet.go	16.79% <0.00%> (ø)
types/module/server/root_module_key.go	11.76% <ø> (+5.88%)	⬆️
x/data/client/testsuite/grpc.go	100.00% <ø> (ø)
x/data/msg_anchor.go	80.00% <ø> (ø)
x/data/msg_attest.go	60.00% <ø> (ø)
x/data/msg_define_resolver.go	80.00% <ø> (ø)
x/data/msg_register_resolver.go	81.81% <ø> (ø)
x/data/server/server.go	71.42% <ø> (ø)
... and 62 more

[ryanchristo]

LGTM

[technicallyty]

lgtm