feat: enhance build configuration with C++ standard support and variable substitution

- Added `cxx_standard` field to the build configuration for specifying C++ standards.
- Updated documentation to reflect new `cxx_standard` and variable substitution capabilities in `cflags`, `ldflags`, and `include`.
- Implemented logic to handle C++ standard flags in the build process.
- Modified object file naming to include source file extensions.
- Updated various builder modules to support new language parsing logic.
- Introduced issue and feature request templates for better community engagement.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,51 @@
+---
+name: Bug Report
+about: Something is broken or behaves unexpectedly
+title: "[bug] "
+labels: bug
+assignees: ''
+---
+
+## Description
+
+<!-- A clear and concise description of the bug -->
+
+## Steps to Reproduce
+
+1. 
+2. 
+3. 
+
+## Expected Behavior
+
+<!-- What should have happened -->
+
+## Actual Behavior
+
+<!-- What actually happened, include full error output -->
+
+```
+paste error output here
+```
+
+## Environment
+
+- **DCR version** (`dcr --version`): 
+- **OS**: 
+- **Compiler / toolchain** (`gcc --version` or `clang --version`): 
+
+## Minimal Reproducible Project
+
+<!-- If possible, share a minimal dcr.toml + source that reproduces the issue -->
+
+```toml
+# dcr.toml
+```
+
+```c
+// src/main.c
+```
+
+## Additional Context
+
+<!-- Anything else that might help -->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,35 @@
+---
+name: Feature Request
+about: Suggest an idea or improvement
+title: "[feat] "
+labels: enhancement
+assignees: ''
+---
+
+## Problem / Motivation
+
+<!-- What problem does this solve? What are you trying to do that's currently hard or impossible? -->
+
+## Proposed Solution
+
+<!-- Describe what you want. Be as specific as possible — CLI flags, config syntax, behavior -->
+
+## Example
+
+<!-- Show how it would look in practice (command, dcr.toml snippet, output) -->
+
+```sh
+# example command
+```
+
+```toml
+# example config
+```
+
+## Alternatives Considered
+
+<!-- Have you tried workarounds? Are there other ways to solve this? -->
+
+## Additional Context
+
+<!-- Links, prior art, related issues, etc. -->

.github/workflows/release.yml

@@ -13,6 +13,10 @@ on:
         description: "Build Linux"
         type: boolean
         default: true
+      run_bsd:
+        description: "Build BSD"
+        type: boolean
+        default: true
       run_macos:
         description: "Build macOS"
         type: boolean
@@ -190,6 +194,55 @@ jobs:
           body_path: .github/release-notes.md
           prerelease: ${{ needs.setup.outputs.prerelease == 'true' }}
 
+# ── BSD ────────────────────────────────────────────────────────────────────
+  build-bsd:
+    if: ${{ github.event_name == 'push' || github.event.inputs.run_bsd == 'true' }}
+    needs: [setup, notes]
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - target: x86_64-unknown-freebsd
+          # При необходимости сюда можно докинуть x86_64-unknown-netbsd
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ needs.setup.outputs.tag }}
+
+      - name: Download Release Notes
+        uses: actions/download-artifact@v4
+        with:
+          name: release-notes
+          path: .github
+
+      - name: Install cargo-zigbuild
+        run: |
+          pip install cargo-zigbuild
+          echo "$HOME/.local/bin" >> $GITHUB_PATH
+
+      - name: Setup Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - name: Build
+        run: cargo zigbuild --release --target ${{ matrix.target }}
+
+      - name: Prepare Artifact
+        run: |
+          ASSET="dcr-${{ matrix.target }}-${{ needs.setup.outputs.version }}"
+          cp target/${{ matrix.target }}/release/dcr "$ASSET"
+          echo "ASSET_NAME=${ASSET}" >> "$GITHUB_ENV"
+
+      - name: Upload Release Asset
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ needs.setup.outputs.tag }}
+          files: ${{ env.ASSET_NAME }}
+          body_path: .github/release-notes.md
+          prerelease: ${{ needs.setup.outputs.prerelease == 'true' }}
+
   # ── Windows ────────────────────────────────────────────────────────────────
   build-windows:
     if: ${{ github.event_name == 'push' || github.event.inputs.run_windows == 'true' }}
@@ -241,7 +294,7 @@ jobs:
     if: |
       (github.event_name == 'push' && needs.setup.outputs.prerelease == 'false') ||
       (github.event_name == 'workflow_dispatch' && github.event.inputs.run_publish == 'true')
-    needs: [setup, build-linux, build-macos, build-windows]
+    needs: [setup, build-linux, build-macos, build-windows, build-bsd]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -258,7 +311,7 @@ jobs:
     if: |
       (github.event_name == 'push' && needs.setup.outputs.prerelease == 'false') ||
       (github.event_name == 'workflow_dispatch' && github.event.inputs.run_brew == 'true')
-    needs: [setup, build-linux, build-macos, build-windows]
+    needs: [setup, build-linux, build-macos]
     runs-on: ubuntu-latest
     steps:
       - name: Download release assets and compute sha256