docs(packaging): switch install docs to pyproject workflows

CONTRIBUTING.md

@@ -14,7 +14,7 @@ Thank you for your interest in contributing to the OWASP AIBOM Generator! This p
 
    ```bash
    # Local Python setup
-   pip install -r requirements.txt
+   pip install .[dev]
    ```
 
 ## Development Workflow
@@ -127,7 +127,7 @@ aibom-generator/
 │   ├── schemas/              # JSON schemas (CycloneDX, SPDX)
 │   └── templates/            # HTML templates
 ├── tests/                    # Unit and integration tests
-└── requirements.txt
+└── pyproject.toml
 ```
 
 ### Key Concepts
@@ -141,7 +141,7 @@ aibom-generator/
 
 ```bash
 # Install test dependencies
-pip install -r requirements.txt
+pip install .[dev]
 
 # Run all tests
 pytest
@@ -158,7 +158,7 @@ pytest tests/test_validation.py -v
 ### Local Development (Recommended)
 
 ```bash
-pip install -r requirements.txt
+pip install .[dev]
 
 # Run API server
 python -m uvicorn src.main:app --reload --port 7860

README.md

@@ -37,7 +37,7 @@ The tool is also listed in the official **[CycloneDX Tool Center](https://cyclon
 
 ### 1. Install Dependencies
 ```bash
-pip install -r requirements.txt
+pip install .
 ```
 
 ### 2. Run Web Application