feat(Geo) Construct: Phase 4 - Documentation

[manavgurnani21]

Description of changes:

With the creation of a new L3 Geo vertical within Amplify, the current documentation for Geo features need to be updated to reflect new functionality. The following changes are made to accomplish that goal:

1. Set up Geo - Redesigned

• adding new set up instructions with new DX
• introducing usage of AWS-managed resources through banner with notice of departure from legacy resources (i.e. maps and places)
• set up instructions for custom access permissions and API keys

2. Customize authorization - New Page 🆕

• instructions on setting up access acceptors
• presenting all access actions comptabile with Geo resources

3. Work with maps - Appended ➕

• added new tabs to set up maps (rendering) with API key access (supported with L3 construct)
• retained legacy map configuration with new Legacy Resources tab

4. Configure location search - Redesigned 🔎

• adding new DX for users to set up place indices

5. Work with location search - Appended ➕

• adding new tabs to set up location search (setting up geocoder and search box)
• retained legacy place configurations with new Legacy Resources tab

6. Configure a geofence collection - Redesigned 🔎

• adding new DX for users to set up place indices

7. Use legacy Geo resources - New Page 🆕

• adding set up instructions for provisioning and configuring legacy resources (i.e. L1 map and place constructs)

Related GitHub issue #, if available:

Instructions

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Which product(s) are affected by this PR (if applicable)?

• [ ] amplify-cli
• [ ] amplify-ui
• [ ] amplify-studio
• [ ] amplify-hosting
• [X] amplify-libraries

Which platform(s) are affected by this PR (if applicable)?

• [ ] JS
• [ ] Swift
• [ ] Android
• [ ] Flutter
• [X] React Native

Please add the product(s)/platform(s) affected to the PR title

Checks

• [X] Does this PR conform to the styleguide?

• [ ] Does this PR include filetypes other than markdown or images? Please add or update unit tests accordingly.

• [ ] Are any files being deleted with this PR? If so, have the needed redirects been created?

• [X] Are all links in MDX files using the MDX link syntax rather than HTML link syntax?
  ref: MDX: [link](https://docs.amplify.aws/) HTML: <a href="https://docs.amplify.aws/">link</a>

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