perf: Update github actions for optimal performance with pioarduino (#1080)

## Summary

* **What is the goal of this PR?**
 speed increase gh workflows, optimized for pioarduino Platform 

* **What changes are included?**
  remove pip and pip cache
  install and use `uv`
use pioarduino core instead of Platformio core for optimal performance
with pioarduino Platform

## Additional Context

- signed off by the maintainer of pioarduino

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? _**< YES | PARTIALLY | NO
>**_NO

.github/workflows/ci.yml

@@ -44,8 +44,14 @@ jobs:
         with:
           python-version: '3.14'
 
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+        with:
+          version: "latest"
+          enable-cache: false
+
       - name: Install PlatformIO Core
-        run: pip install --upgrade platformio
+        run: uv pip install --system -U https://github.com/pioarduino/platformio-core/archive/refs/tags/v6.1.19.zip
 
       - name: Run cppcheck
         run: pio check --fail-on-defect low --fail-on-defect medium --fail-on-defect high
@@ -61,8 +67,14 @@ jobs:
         with:
           python-version: '3.14'
 
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+        with:
+          version: "latest"
+          enable-cache: false
+
       - name: Install PlatformIO Core
-        run: pip install --upgrade platformio
+        run: uv pip install --system -U https://github.com/pioarduino/platformio-core/archive/refs/tags/v6.1.19.zip
 
       - name: Build CrossPoint
         run: |

.github/workflows/release.yml

@@ -12,19 +12,18 @@ jobs:
         with:
           submodules: recursive
 
-      - uses: actions/cache@v5
-        with:
-          path: |
-            ~/.cache/pip
-            ~/.platformio/.cache
-          key: ${{ runner.os }}-pio
-
       - uses: actions/setup-python@v6
         with:
           python-version: '3.14'
 
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+        with:
+          version: "latest"
+          enable-cache: false
+
       - name: Install PlatformIO Core
-        run: pip install --upgrade platformio
+        run: uv pip install --system -U https://github.com/pioarduino/platformio-core/archive/refs/tags/v6.1.19.zip
 
       - name: Build CrossPoint
         run: pio run -e gh_release

.github/workflows/release_candidate.yml

@@ -12,19 +12,18 @@ jobs:
         with:
           submodules: recursive
 
-      - uses: actions/cache@v5
-        with:
-          path: |
-            ~/.cache/pip
-            ~/.platformio/.cache
-          key: ${{ runner.os }}-pio
-
       - uses: actions/setup-python@v6
         with:
           python-version: '3.14'
 
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+        with:
+          version: "latest"
+          enable-cache: false
+
       - name: Install PlatformIO Core
-        run: pip install --upgrade platformio
+        run: uv pip install --system -U https://github.com/pioarduino/platformio-core/archive/refs/tags/v6.1.19.zip
 
       - name: Extract env
         run: |