Add org member management

[gabor-boros]

Description

This PR closes #318 with all of its subtasks:

• closes Invite users into organizations #150
• closes Create organization roles list page #335
• closes Create organization role edit page #336
• closes Create organizations role create page #371
• closes Create organization role delete modal #373
• closes Create change organization member role modal #374

Also, it refactors the way we do end to end tests to make them more reliable and easier to work with.

Dependencies

N/A

Screenshots

Details

Testing instructions

1. Login as demo user
2. Create a new role
3. Assign some permissions (for existing resources)
4. Add Hector members to the new role
5. Invite a new member to the org and, -- in a private browser session --, accept the invitation
6. Add the new member to roles
7. Check if the new member has permission/access to the org
8. Remove the new member

Checklist

• I have read and understood the Developer's Certificate of Origin and
  added Signed-off-by: <YOUR NAME> to the commit trail where <YOUR NAME> is
  my name.

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2 Skipped Deployments

Project	Deployment	Preview	Comments	Updated (UTC)
elemo-api-docs	Ignored			Nov 10, 2025 6:38am
elemo-marketing	Ignored			Nov 10, 2025 6:38am

[codecov]

Codecov Report

❌ Patch coverage is 32.57373% with 503 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
internal/transport/http/organization.go	0.00%	215 Missing ⚠️
internal/service/organization.go	39.68%	107 Missing and 45 partials ⚠️
internal/service/role.go	31.53%	62 Missing and 14 partials ⚠️
internal/repository/neo4j/organization.go	60.71%	26 Missing and 7 partials ⚠️
internal/transport/http/permission.go	0.00%	7 Missing ⚠️
internal/pkg/convert/convert.go	82.35%	3 Missing and 3 partials ⚠️
internal/repository/redis/role.go	0.00%	2 Missing and 2 partials ⚠️
internal/service/user.go	0.00%	4 Missing ⚠️
internal/repository/neo4j/permission.go	62.50%	1 Missing and 2 partials ⚠️
internal/transport/http/user.go	0.00%	2 Missing ⚠️
... and 1 more

Files with missing lines	Coverage Δ
internal/email/auth.go	100.00% <ø> (ø)
internal/email/organization.go	100.00% <ø> (ø)
internal/model/auth.go	100.00% <100.00%> (ø)
internal/model/permission.go	100.00% <100.00%> (ø)
internal/repository/neo4j/edge.go	100.00% <ø> (ø)
internal/repository/redis/organization.go	95.55% <100.00%> (+0.81%)	⬆️
internal/service/email.go	96.87% <100.00%> (-0.10%)	⬇️
internal/service/service.go	78.37% <100.00%> (+1.90%)	⬆️
internal/transport/http/role.go	0.00% <0.00%> (ø)
internal/transport/http/user.go	0.00% <0.00%> (ø)
... and 9 more

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