feat: pare down docs to only show API refs (#2770)

This PR does the following: 
- Pare down the docs to only what's needed (Python, JS/TS API docs and a
pointer to Rust docs)
- Styling changes to be more in line with the main website theme

The relative URLs remain unchanged, so assuming CI passes, there should
be no breaking changes from the main docs site that points back here.

.github/workflows/docs_test.yml

@@ -1,61 +0,0 @@
-name: Documentation Code Testing
-
-on:
-  push:
-    branches:
-      - main
-    paths:
-      - docs/**
-      - .github/workflows/docs_test.yml
-  pull_request:
-    paths:
-      - docs/**
-      - .github/workflows/docs_test.yml
-
-  # Allows you to run this workflow manually from the Actions tab
-  workflow_dispatch:
-
-env:
-  # Disable full debug symbol generation to speed up CI build and keep memory down
-  # "1" means line tables only, which is useful for panic tracebacks.
-  RUSTFLAGS: "-C debuginfo=1 -C target-cpu=haswell -C target-feature=+f16c,+avx2,+fma"
-  RUST_BACKTRACE: "1"
-
-jobs:
-  test-python:
-    name: Test doc python code
-    runs-on: warp-ubuntu-2204-x64-8x
-    timeout-minutes: 60
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v4
-    - name: Print CPU capabilities
-      run: cat /proc/cpuinfo
-    - name: Install protobuf
-      run: |
-        sudo apt update
-        sudo apt install -y protobuf-compiler
-    - name: Install dependecies needed for ubuntu
-      run: |
-        sudo apt install -y libssl-dev
-        rustup update && rustup default
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: 3.11
-        cache: "pip"
-        cache-dependency-path: "docs/test/requirements.txt"
-    - name: Rust cache
-      uses: swatinem/rust-cache@v2
-    - name: Build Python
-      working-directory: docs/test
-      run:
-        python -m pip install --extra-index-url https://pypi.fury.io/lancedb/ -r requirements.txt
-    - name: Create test files
-      run: |
-        cd docs/test
-        python md_testing.py
-    - name: Test
-      run: |
-        cd docs/test/python
-        for d in *; do cd "$d"; echo "$d".py; python "$d".py; cd ..; done