Make an initial commit when creating a Snap from template

[ziad-saab]

Note: merge this after #1916

When creating a new Snap using the create-snap CLI, we make an initial commit with the code of the template. This makes it easier for devs to see the changes they make as they start hacking on the template, without having to remember to make an initial commit manually.

This is similar to what's done by other "create" projects such as CRA.

Tested:

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (d533938) 96.19% compared to head (4dfcb59) 96.09%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1917      +/-   ##
==========================================
- Coverage   96.19%   96.09%   -0.10%     
==========================================
  Files         245      246       +1     
  Lines        5888     5999     +111     
  Branches      964      980      +16     
==========================================
+ Hits         5664     5765     +101     
- Misses        224      234      +10     

Files	Coverage Δ
packages/create-snap/src/cmds/init/initHandler.ts	100.00% <100.00%> (ø)
packages/create-snap/src/cmds/init/initUtils.ts	100.00% <100.00%> (ø)
...ages/snaps-controllers/src/snaps/SnapController.ts	97.65% <100.00%> (ø)
packages/snaps-controllers/src/utils.ts	97.22% <100.00%> (+0.55%)	⬆️
...ges/snaps-simulator/src/features/manifest/sagas.ts	100.00% <100.00%> (ø)
...ages/snaps-simulator/src/features/polling/sagas.ts	95.08% <100.00%> (+0.74%)	⬆️
...lator/src/features/simulation/test/mockManifest.ts	100.00% <ø> (ø)
packages/snaps-utils/src/localization.ts	100.00% <100.00%> (ø)
packages/snaps-utils/src/manifest/manifest.ts	99.35% <100.00%> (+0.04%)	⬆️
packages/snaps-utils/src/manifest/validation.ts	100.00% <ø> (ø)
... and 6 more

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[FrederikBolding]

@ziad-saab Can you rebase this and resolve the conflict? Then we can merge