ci(build): add basic workspace and cicd configuration

.github/CODEOWNERS

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+# Lines starting with '#' are comments.
+# Each line is a file pattern followed by one or more owners.
+
+*       @rfprod

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Reproduction**
+Steps to reproduce the unwanted behavior:
+
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**User specification**
+Filling in the specification helps address the issue faster.
+
+- **Device**
+  - type: [e.g. desktop, laptop, tablet, smartphone]
+  - OS: [e.g. Ubuntu 20.04, Windows 10, Android 12, iOS 8.1]
+- **Browser**
+  - name: [e.g. Chromium, Chrome, Firefox]
+  - version: [e.g. Version 25.0.1364.126 (Official Build) snap (64-bit), Version 100.0.4896.75 (Official Build) (64-bit), 99.0 (64-bit)]
+
+**Additional context**
+Add any extra context and/or screenshots about the feature request.
+
+**Preconditions for fixing**
+Add any preconditions for fixing the problem.
+This section is filled in by the maintainers in general case.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any extra context and/or screenshots about the feature request.
+
+**Preconditions for implementation**
+Add any preconditions for implementation of the feature.
+This section is filled in by the maintainers mainly.

.github/ISSUE_TEMPLATE/maintenance.md

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+---
+name: Maintenance request
+about: Suggest an idea for this project maintenance
+title: ''
+labels: ''
+assignees: ''
+---
+
+**Describe the proposal**
+A clear and concise description of the idea. Ex. improve project modularity, break down big libraries into smaller ones, decouple unrelated logic, update the project dependencies [...]
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions you've considered.
+
+**Additional context**
+Add any other context and/or screenshots about the maintenance request.
+
+**Preconditions for maintenance**
+Add any preconditions for performing the maintenance.
+This section is filled in by the maintainers mainly.

.github/actions/workspace-cache/action.yml

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+# For more information see:
+# - https://docs.github.com/en/actions/creating-actions/creating-a-composite-action
+# - https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#outputsoutput_id
+
+# The action can be referenced in workflows like:
+# - rfprod/cpp-workspace/.github/actions/workspace-cache@main
+# ./.github/actions/workspace-cache
+
+name: workspace-cache
+description: Configure and use workspace cache
+outputs:
+  os:
+    description: Runner os
+    value: ${{ runner.os }}
+  commitsha:
+    description: GitHub commit SHA
+    value: ${{ steps.get-variables.outputs.commitsha }}
+  compilerversion:
+    description: gcc version
+    value: ${{ steps.get-variables.outputs.compilerversion }}
+  cache-hit:
+    description: Workspace cache hit
+    value: ${{ steps.workspace-cache.outputs.cache-hit }}
+
+runs:
+  using: 'composite'
+  steps:
+    - name: Get variables (commit hash, gcc version)
+      id: get-variables
+      shell: bash
+      run: |
+        echo "::set-output name=commitsha::$(echo ${GITHUB_SHA})";
+        echo "::set-output name=compilerversion::$(g++ --version | head -n1 | sed -r s/\\s/-/g)";
+
+    - name: Workspace cache
+      uses: actions/cache@v5
+      id: workspace-cache
+      with:
+        path: |
+          build/
+          ~/.conan2/
+        key: ${{ runner.os }}-cpp-${{ steps.get-variables.outputs.compilerversion }}-conan-${{ hashFiles('**/CMakeLists.txt', '**/conanfile.txt', '**/conanfile.py') }}-sha-${{ steps.get-variables.outputs.commitsha }}
+        restore-keys: |
+          ${{ runner.os }}-cpp-${{ steps.get-variables.outputs.compilerversion }}-conan-${{ hashFiles('**/CMakeLists.txt', '**/conanfile.txt', '**/conanfile.py') }}-sha-
+          ${{ runner.os }}-cpp-${{ steps.get-variables.outputs.compilerversion }}-conan-
+          ${{ runner.os }}-cpp-

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: 'github-actions'
+    directory: '/.github/workflows'
+    schedule:
+      interval: 'weekly'
+      day: 'monday'
+      time: '04:00'
+    groups:
+      all-actions:
+        patterns:
+          - '*'
+    commit-message:
+      prefix: 'ci'
+      include: 'scope'
+    open-pull-requests-limit: 1
+    labels:
+      - 'CI/CD'
+      - 'Dependencies'
+      - 'Maintenance'
+  - package-ecosystem: 'github-actions'
+    directory: '/.github/actions'
+    schedule:
+      interval: 'weekly'
+      day: 'monday'
+      time: '04:00'
+    groups:
+      all-actions:
+        patterns:
+          - '*'
+    commit-message:
+      prefix: 'ci'
+      include: 'scope'
+    open-pull-requests-limit: 1
+    labels:
+      - 'CI/CD'
+      - 'Dependencies'
+      - 'Maintenance'