front: add a modal to manage waypoints in manchette

[SharglutDev]

close #8627

Will stay in draft until #8775 is merged

A temporary "Waypoint" button has been added on top of the space time chart to test the PR
Submitting the modal won't update the manchette for now (will be done in #8628)

Warning

The shift + click doesn't work with firefox (OpenRailAssociation/osrd-ui#510)

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.27%. Comparing base (68e0513) to head (9c45b12).
Report is 1 commits behind head on dev.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@              Coverage Diff              @@
##                dev    #8796       +/-   ##
=============================================
+ Coverage     37.13%   67.27%   +30.13%     
  Complexity     2211     2211               
=============================================
  Files          1260      662      -598     
  Lines        115076    48475    -66601     
  Branches       3230     2086     -1144     
=============================================
- Hits          42736    32612    -10124     
+ Misses        70407    15067    -55340     
+ Partials       1933      796     -1137     

Flag	Coverage Δ
core	74.67% <ø> (ø)
editoast	72.56% <ø> (+<0.01%)	⬆️
front	?
gateway	2.20% <ø> (ø)
osrdyne	2.60% <ø> (ø)
railjson_generator	87.49% <ø> (ø)
tests	86.46% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.