Update library README

README.md

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+# PhotosAPI_Client
+
+Generated using [openapi-python-client](https://github.com/openapi-generators/openapi-python-client) client library for [PhotosAPI](https://git.end-play.xyz/profitroll/PhotosAPI)
+
+## Usage
+
+Please, refer to [library README](PhotosAPI_Client/README.md)
+
+## Building / generating this Client
+
+This project is separated into to parts:
+
+1. The generator (located where this README is)
+2. The generated library (located under `PhotosAPI_Client/`)
+
+### Generating
+
+1. Create a virtual environment `.venv` in the repository root:  
+    `python -m venv .venv` / `virtualenv .venv`
+2. Use this virtual environment:  
+    `source .venv/bin/activate` / `.venv\Scripts\activate.ps1`
+3. Install the dependencies:  
+    `pip install -r requirements.txt`
+4. Generate/update the client:  
+    * Generate: `.openapi-python-client generate --config config.yaml --url "OPENAPI_SPEC_URL"` (replace `OPENAPI_SPEC_URL` with your URL)
+    * Update: `openapi-python-client update --config config.yaml --url "OPENAPI_SPEC_URL"` (replace `OPENAPI_SPEC_URL` with your URL)
+
+### Building
+
+1. Create a virtual environment `.venv` in the repository root:  
+    `python -m venv .venv` / `virtualenv .venv`
+2. Use this virtual environment:  
+    `source .venv/bin/activate` / `.venv\Scripts\activate.ps1`
+3. Install the dependencies:  
+    `pip install -r requirements.txt`
+4. Build the client:  
+    `python -m build ./PhotosAPI_Client`
+5. Artifacts can be found under `PhotosAPI_Client/dist`
+
+### Generating and building with VSCode
+
+1. Steps about virtual environments **MUST** be completed first
+2. Use `Terminal > Run Task` to select the task you want to start