Update predict api docs

[odunbar]

Purpose

• Closes Remove/update uses of transform_to_real from documentation #411

Docs can be found here

Content

• remove mentions of transform_to_real in examples/ and docs/
• add notes for encode and add_obs_noise_cov

---

• I have read and checked the items on the review checklist.

[odunbar]

Just some docs changes, so will merge on confirmation

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.18%. Comparing base (3f63106) to head (cffd497).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #414   +/-   ##
=======================================
  Coverage   94.18%   94.18%           
=======================================
  Files          10       10           
  Lines        1977     1977           
=======================================
  Hits         1862     1862           
  Misses        115      115           

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.