docs: add projects/index migration investigation and plan

[JeffySam]

Description

This PR adds documentation for the migration of the
projects/index parent state from AngularJS to Angular.

Included documents

• Projects Index Migration Investigation

  • Describes current migration status
  • Confirms Angular implementation completeness
  • Identifies legacy AngularJS files pending removal
  • Lists dependent child states and verification requirements

• Projects Index Migration Plan

  • Defines verification steps before cleanup
  • Outlines safe removal of legacy files
  • Provides testing checklist and success criteria

Scope

• Documentation only
• No production code changes

Purpose

To provide clear technical context and a structured, low-risk path
to finalising the projects/index parent state migration.

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[SteveDala]

Hi @JeffySam,

I checked out your changes locally. The content of the two documents seems a little trivial, but I think there's probably a place for this kind of process or action log. I don't think that place is in the root Markdown directory of src/content/docs; currently the only way to view your contribution is to directly navigate to /projects_index_migration_plan/, try this link to see what I'm talking about - or similar for your investigation document.

1. Please try to find a new location for these two files, perhaps under src/content/docs/Products/OnTrack/Documentation/Front End Migration/Migration.

In addition, the table on the rendered page looks kind of bad:

Notice the right-hand column extending all the way to the right of the container. This isn't your fault, but I think it should be fixed:

2. You can find the custom CSS at src/content/styles/custom.css. Please add the following property and value inside the CSS rule for .sl-markdown-content table selector: max-width: max-content;

[JeffySam]

hi @SteveDala Thanks for the review!

• Moved both documents under:
  src/content/docs/Products/OnTrack/Documentation/Front End Migration/Migration/
  so they’re no longer in the root docs directory.

• Added max-width: max-content; to the
  .sl-markdown-content table rule in
  src/styles/custom.css to address the table layout issue you noted.

[SteveDala]

There are still a couple of nits. See below

[SteveDala]

The table that was previously here no longer exists. Was this intentional? If so, please remove this heading.

[SteveDala]

If this is a checklist now, it would be better to fill in the checks with [x] so that it's clear these were checked as part of your process.

[JeffySam]

@SteveDala Thanks for the follow-up!

• Removed the leftover “Child State Verification Matrix” heading since the table was intentionally replaced.

• Updated the verification checklist to use [x] to clearly indicate these checks were completed as part of the migration validation process.

[SteveDala]

Approved. @BrianDangDev please proceed with an approving review to merge.

[JeffySam]

Hi @SteveDala , quick heads-up — I removed the Units module docs from this PR as they’re meant for a separate documentation PR. The originally approved content is unchanged.

Could you please re-approve when you get a moment? Thanks!

[SteveDala]

As the content is not substantially different than my previous approval, the approval stands.