Replace lychee with targeted ISO link validation for src/define.sh

          yaml_exclude_regex: ".*\\kubernetes\\.yml$"

      -

        name: Validate Links

        uses: lycheeverse/lychee-action@v2

        with:

          fail: true

        run: |

          errors=0

          count=0

          host=""

          declare -A seen

          check() {

            local url="$1" http

            http=$(curl -sSL -o /dev/null -w "%{http_code}" --max-time 10 -I -- "$url" 2>&1) || http="000"

            [[ "$http" == 2* ]] && return 0

            http=$(curl -sSL -o /dev/null -w "%{http_code}" --max-time 10 -r "0-0" -- "$url" 2>&1) || http="000"

            [[ "$http" == 2* ]]

          }

          while IFS= read -r line; do

            if [[ "$line" =~ ^[[:space:]]*local[[:space:]]+host=\"(https://[^\"]+)\" ]]; then

              host="${BASH_REMATCH[1]%/}"

              continue

            fi

            [[ "$line" =~ ^[[:space:]]*url=\"(.+)\" ]] || continue

            val="${BASH_REMATCH[1]#/}"

            if [[ "$val" == https://* ]]; then

              url="$val"

            elif [[ -n "$host" ]]; then

              url="$host/$val"

            else

              continue

            fi

            [[ -v seen[$url] ]] && continue

            seen[$url]=1

            count=$((count + 1))

            if check "$url"; then

              echo "  OK: $url"

            else

              echo "FAIL: $url"

              errors=$((errors + 1))

            fi

          done < "src/define.sh"

          echo ""

          printf '%d/%d links valid\n' "$(( count - errors ))" "$count"

          (( errors == 0 ))