[ACS-6926] Fix plugins routing

[nikita-web-ua]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x")

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation
• Other... Please describe:

What is the current behaviour? (You can also link to an open issue here)

User can open page for specific plugin by typing url even if plugin is disabled
https://hyland.atlassian.net/browse/ACS-6926

What is the new behaviour?

• PluginEnabledGuard moved to aca-shared
• Routing for disabled plugins restricted
• Removed the rule that caused the “Files” section to be hidden in the navigation bar when contentService=false.

Does this PR introduce a breaking change? (check one with "x")

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud