[ENH] Implemented IsolatedForest in anomaly detection with some test cases

[notaryanramani]

Reference Issues/PRs

Fixes #2108

What does this implement/fix? Explain your changes.

Implements PyODAdapter for IsolationForest in anomaly_detection along with some test cases.

Does your contribution introduce a new dependency? If yes, which one?

No

Any other comments?

Looking for feedback on class documentation & more test cases if needed.

No.

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[aeon-actions-bot[bot]]

Thank you for contributing to aeon

I have added the following labels to this PR based on the title: [ $\color{#FEF1BE}{\textsf{enhancement}}$ ]. I have added the following labels to this PR based on the changes made: [ $\color{#6F6E8D}{\textsf{anomaly detection}}$ ]. Feel free to change these if they do not properly represent the PR.

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[SebastianSchmidl]

@notaryanramani please do not use force-pushes in the future. This breaks GitHub's differential reviewing feature.

[MatthewMiddlehurst]

Thanks for contributing. Few very minor things but not worth another round of reviews IMO.

[TonyBagnall]

thanks for this

[allcontributors[bot]]

@notaryanramani

I couldn't determine any contributions to add, did you specify any contributions? Please make sure to use valid contribution names.

[allcontributors[bot]]

@notaryanramani

@notaryanramani already contributed before to code