feat: generate version for templates usage

[dariuszd21]

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• Have you signed the CLA?
• Have you successfully run tox?

Add version to the context of the InitService, which may be re-used in template for generating craft.yaml files

(CRAFT-3636)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.53%. Comparing base (0705676) to head (e4a4b37).
Report is 308 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (0705676) and HEAD (e4a4b37). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (0705676)	HEAD (e4a4b37)
	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #548      +/-   ##
==========================================
- Coverage   99.28%   90.53%   -8.76%     
==========================================
  Files          29       64      +35     
  Lines        1265     3622    +2357     
  Branches      209      396     +187     
==========================================
+ Hits         1256     3279    +2023     
- Misses          6      275     +269     
- Partials        3       68      +65     

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[mr-cal]

Looks good, two requests:

• Can you update the changelog?
• Can you add/update an integration test for the init service to set the version?

[dariuszd21]

Looks good, two requests:

* Can you update the changelog?

* Can you add/update an integration test for the init service to set the version?

Changelog:
bc92b97

Integration tests:
00c2386

[mr-cal]

Looks great, nice work!