docs: Add documentation for integrated vectorization.

[superhindupur]

Purpose

This PR adds a section to the README on Integrated Vectorization that links to a page that describes how to deploy it.
Required by #761.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Documentation content changes
[ ] Other... Please describe:

How to Test

n/a

[github-actions]

Coverage Report •

File	Stmts	Miss	Cover	Missing
TOTAL	2297	676	70%

report-only-changed-files is enabled. No files were changed during this commit :)

Tests	Skipped	Failures	Errors	Time
178	0 💤	0 ❌	0 🔥	11.723s ⏱️

[adamdougal]

[adamdougal]

As discussed can we add a section about the inability to switch between push and pull.

[komalg1]

This is great. Just a couple of things we can add

• we should tell users that they can select IV as true when they first deploy (Deploy to Azure button)
• Use azd env set on a fresh deployment (when the index has not yet been created)
• In case anyone wants to migrate they can delete the index in case of push & in case of pull delete index, indexer, datasource, skillset

Also, shall we hold on this merge till the time all IV changes are pushed in?

[frtibble]

Looks great! Once the IV changes are in, I'd be happy to go through the docs/steps to test it out as a user fresh to it.

[gaurarpit]

LGTM

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[adamdougal]