chore(docs): create ADR for client-side routing

[taymoor89]

Summary

This PR add an ADR for client-side routing so other apps can add routing based on the same principals.

Changes Made

• Created an ADR in docs

Related Issues

• [Task](Juno): ADR for Tanstack router usage, common URL patterns (for pages, Panel, Modal, state), testing #1022

Screenshots (if applicable)

Testing Instructions

1. pnpm i
2. pnpm TASK

Checklist

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new warnings or errors.
• I have created a changeset for my changes.

PR Manifesto

Review the PR Manifesto for best practises.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 807a0a5

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[andypf]

👍

[hodanoori]

Thanks for preparing this ADR

[ArtieReus]

lgtm

[hodanoori]

lgtm

[edda]

Thank you! I like it!

Two things I would propose:

1. add the info form your comment with the justification for the encode/decode utility to the ADR itself. I think it's very valuable additional information that helps understand the decision. Also a simple example of what encode and decode does could help
2. Section 5. Route Definitions and UI State: a couple of examples would help understand this better, imo. So give an example for one or two routes coming out of the file-based routing, then give an example how they would change with an opened panel or modal.