feat: password reset email view

[oxgr]

Changes behaviour of pressing password reset button (icon beside emails in Community page) to sending a a password reset email.

Removed secondary functionality of the same icon which registers a user without a password since that process is taken over by the onboarding registration process.

TODO:

• [x] Add French subtitles

Partially addresses #372

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Type of change:

• [ ] Bug fix (change which fixes an issue).
• [x] New feature (change which adds functionality).
• [ ] Changes to models (requires making migrations).

• [ ] Documentation change.

  What's Changed:

• add PasswordReset view
• edit Community view template
• remove "Register User" functionality

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Affected URLs:

• 127.0.0.1:8000/reset_password/
• 127.0.0.1:8000/community/

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Checklist:

• [x] My code follows the style guidelines of this project.
• [ ] I have performed a self-review of my own code.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [x] I have made corresponding changes to the documentation.
• [x] My changes generate no new warnings.
• [x] New and existing unit tests pass locally with my changes.