[docs] Update OceanDataStore v0.3.0 documentation

[oj-tooth]

Update Documentation for OceanDataStore v0.3.0 Release

Actions

• Rename tabs: Write Data, Explore Data, Access Data.
• Add a quick-start guide on Analysis-Ready Cloud Optimised formats & Icechunk etc.

OceanDataStore CLI

• Examples: Writing data to Icechunk repos using CLI.
• Examples: Writing data to Icechunk repos using .py scripts.
• Examples: Writing & regularly updating lots of data to Icechunk repost using bash scripts .
• Examples: Updating global and variable metadata in an Icechunk repo.

OceanDataCatalog

• Examples: Searching for ocean observations using NOC STAC.
• Examples: Opening hierarchical Icechunk repository.
• Examples: Using OceanDataStore & NEMO Cookbook.