chore: Revamp project.

- Updates for pyproject.toml setup.
- Drop threejs plot.
- Update pyntcloud_ci. Rename to tests.yaml

Author: daavoo

.flake8

@@ -1,43 +1,33 @@
-name: pyncloud C.I.
+name: Tests
 
 on:
   pull_request:
     branches:
-      - master
+      - main
   push:
     branches:
-      - master
+      - main
 
 jobs:
   build:
 
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.11, 3.12, 3.13]
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install -r requirements.txt
+        cache: "pip"
     - name: Install pyntcloud
       run: |
-        pip install .
-    - name: Lint with flake8
-      run: |
-        pip install flake8
-        # stop the build if there are Python syntax errors or undefined names
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+        pip install ".[all]"
     - name: Test and coverage with pytest
       run: |
         pip install pytest
@@ -47,7 +37,7 @@ jobs:
         pytest --cov=pyntcloud --cov-report=xml --cov-append tests/integration 
 
     - name: Upload coverage to Codecov  
-      if: matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.7'
+      if: matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.11'
       run: bash <(curl -s https://codecov.io/bash) -t $TOKEN -B $REF
       env:
         TOKEN: "${{ secrets.CODECOV_TOKEN }}"