Move getting started & .env to each project

[nicolewhite]

Changed my mind, I think it makes more sense for each example to have a self contained README instead of asking people to go look at the main README first. Also makes it easier to link directly to an example

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Name	Status	Preview	Updated (UTC)
autoblocks-examples	✅ Ready (Inspect)	Visit Preview	Oct 26, 2023 1:07pm

[review-agent-prime]

The changes in this PR are mostly about updating the README files and the CI workflow. Here are some suggestions:

1. In the ci.yml file, you have duplicated the Checkout repository and Setup Node steps in the test-readmes-up-to-date job. You should remove the duplicates to keep the workflow clean and efficient.

2. In the ci.yml file, you have duplicated the project matrix in the test-python and test-javascript jobs. You should remove the duplicates to keep the workflow clean and efficient.

3. In the ci.yml file, the working-directory for the Install dependencies and Run script steps in the test-python and test-javascript jobs is now set globally for each job. Make sure that this doesn't affect the correct execution of these steps.

4. In the make-readmes.js file, you are replacing the content between the getting started start and getting started end comments with the GETTING_STARTED constant. Make sure that all README files have these comments, otherwise the replaceContentBetweenComments function will return the original content.

Here are the code suggestions for the first two points:

## .github/workflows/ci.yml

 jobs:
   test-readmes-up-to-date:
     runs-on: ubuntu-latest
     steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Setup Node
        uses: actions/setup-node@v3

-     - name: Checkout repository
-       uses: actions/checkout@v4

-     - name: Setup Node
-       uses: actions/setup-node@v3

...

   test-python:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        project:
          - Python/langchain
          - Python/openai-manual
          - Python/openai-automated

-    strategy:
-      matrix:
-        project:
-          - Python/langchain
-          - Python/openai-manual
-          - Python/openai-automated

...

   test-javascript:
     runs-on: ubuntu-latest

    strategy:
      matrix:
        project:
          - JavaScript/langchain
          - JavaScript/openai-automated
          - JavaScript/openai-manual

-    strategy:
-      matrix:
-        project:
-          - JavaScript/langchain
-          - JavaScript/openai-automated
-          - JavaScript/openai-manual