v6 changes: split Vault testing, drop core 2.13, add py3.12, bump hvac minimum, add dependabot, more small changes

[briantist]

SUMMARY

• Split integration matrix for Vault versions now that we have more concurrency in GHA
• Use the correct Vault docker image in integration tests
• Drop support for core 2.13
• Add support for Python 3.12
• Bump minimum hvac version to 1.2.1
• Fix formatting in user guide requirements
• Bump actions/checkout to v4 and disable git progress
• Update release workflow to support galaxy v3
• Update readme
• Add dependabot.yml

ISSUE TYPE

• CI Pull Request

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6a72430) 98.87% compared to head (2bab75c) 98.85%.

❗ Current head 2bab75c differs from pull request most recent head a308a54. Consider uploading reports for the commit a308a54 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #403      +/-   ##
==========================================
- Coverage   98.87%   98.85%   -0.03%     
==========================================
  Files          82       82              
  Lines        4282     4282              
  Branches      466      841     +375     
==========================================
- Hits         4234     4233       -1     
  Misses         39       39              
- Partials        9       10       +1     

Flag	Coverage Δ
env_docker-default	98.85% <ø> (-0.03%)	⬇️
integration	81.05% <ø> (ø)
sanity	39.25% <ø> (ø)
target_auth_approle	89.47% <ø> (ø)
target_auth_aws_iam	50.00% <ø> (ø)
target_auth_azure	53.84% <ø> (ø)
target_auth_cert	86.36% <ø> (ø)
target_auth_jwt	91.30% <ø> (ø)
target_auth_ldap	89.47% <ø> (ø)
target_auth_none	100.00% <ø> (ø)
target_auth_token	71.42% <ø> (ø)
target_auth_userpass	85.71% <ø> (ø)
target_connection_options	74.76% <ø> (ø)
target_controller	84.03% <ø> (-0.06%)	⬇️
target_filter_vault_login_token	77.77% <ø> (ø)
target_import	39.25% <ø> (ø)
target_lookup_hashi_vault	81.33% <ø> (ø)
target_lookup_vault_ansible_settings	56.07% <ø> (ø)
target_lookup_vault_kv1_get	91.30% <ø> (ø)
target_lookup_vault_kv2_get	91.11% <ø> (ø)
target_lookup_vault_list	90.00% <ø> (ø)
target_lookup_vault_login	88.57% <ø> (ø)
target_lookup_vault_read	90.00% <ø> (ø)
target_lookup_vault_token_create	79.24% <ø> (ø)
target_lookup_vault_write	57.02% <ø> (ø)
target_module_utils	97.48% <ø> (ø)
target_module_vault_kv1_get	87.50% <ø> (ø)
target_module_vault_kv2_delete	56.93% <ø> (ø)
target_module_vault_kv2_get	87.23% <ø> (ø)
target_module_vault_kv2_write	57.32% <ø> (ø)
target_module_vault_list	85.71% <ø> (ø)
target_module_vault_login	83.72% <ø> (ø)
target_module_vault_pki_generate_certificate	78.72% <ø> (ø)
target_module_vault_read	85.71% <ø> (ø)
target_module_vault_token_create	91.66% <ø> (ø)
target_module_vault_write	56.11% <ø> (ø)
target_modules	82.35% <ø> (ø)
units	95.57% <ø> (-0.03%)	⬇️

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see 1 file with indirect coverage changes

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[github-actions]

Docs Build 📝

Thank you for contribution!✨

This PR has been merged and the docs are now incorporated into main:
https://ansible-collections.github.io/community.hashi_vault/branch/main