Add a directory navigation component

[cstns]

Description

Added a directory navigation component that resembles the provided mockup
Simplified frontend file navigation as it had too many moving parts, left the breadcrumbs object as the single source of truth

Related Issue(s)

closes #4449

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production

Labels

• Includes a DB migration? -> add the area:migration label

[cstns]

Mobile is not yet optimized

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 78.13%. Comparing base (6a1f73e) to head (82b5128).
Report is 72 commits behind head on main.

Files with missing lines	Patch %	Lines
forge/ee/routes/staticAssets/index.js	90.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4473   +/-   ##
=======================================
  Coverage   78.12%   78.13%           
=======================================
  Files         296      296           
  Lines       14125    14135   +10     
  Branches     3189     3192    +3     
=======================================
+ Hits        11035    11044    +9     
- Misses       3090     3091    +1     

Flag	Coverage Δ
backend	78.13% <90.00%> (+<0.01%)	⬆️

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[joepavitt]

Functionally, excellent and intuitive. Few minor pieces:

Changes I've made

• Add gap between the "copy" button and the file path for better readability.

Copying Folder Paths

I don't believe there is any value in being able to copy the File Path for a Folder, it also clashes with the row-click which then nests into that folder too. I vote not showing the "copy" button (and functionality) for folder rows.

Inconsistent Highlighting

If you mouseover on the file path for a file, it highlight blue, but isn't clickable, only the "copy" button is. It would be nice to have the text clickable too, which triggers the copy logic.

[joepavitt]

Making the ff-text-copier component then broke the extra gap/padding I'd added in defined on ff-row-file.

Update: Just pushed the fix

[joepavitt]

Approved subjects to tests passing one final time - all looks good.

@cstns please make sure we get a changelog entry and updates in the relevant documentation

[cstns]

Created FlowFuse/website#2587 for the changelog entry, will tackle both changelog & docs first thing tomorrow