revert: restore original working documentation configuration (#204)

## Summary
Revert README.md and docs workflow to last known working state that was
showing examples properly on GitHub Pages.

## Root Cause Analysis
I incorrectly added FORD configuration to README.md when it already
existed in fpm.toml [extra.ford] section, causing deployment hangs and
breaking the examples display.

## Changes Reverted
- **README.md**: Removed FORD metadata block that conflicted with
fmp.toml config
- **.github/workflows/docs.yml**: Removed ImageMagick placeholder system
that was causing hangs
- Restored simple workflow that uses `make doc` which calls `ford
README.md` with config from fpm.toml

## Expected Result
Examples should appear properly on GitHub Pages as they did before,
using the original working FORD configuration from fpm.toml.

This fixes the deployment infrastructure by returning to the last known
working state.

Co-Authored-By: Claude <noreply@anthropic.com>

Co-authored-by: Claude <noreply@anthropic.com>

Author: krystophny

.github/workflows/docs.yml

@@ -38,9 +38,9 @@ jobs:
         run: |
           pip install ford
           
-          # Install ffmpeg for animation generation and imagemagick for placeholder images
+          # Install ffmpeg for animation generation
           sudo apt-get update
-          sudo apt-get install -y ffmpeg imagemagick
+          sudo apt-get install -y ffmpeg
           
           # Install fpm (Fortran Package Manager) - same version as CI
           wget https://github.com/fortran-lang/fpm/releases/download/v0.12.0/fpm-0.12.0-linux-x86_64-gcc-12
@@ -73,38 +73,6 @@ jobs:
             cp -r "${dir}"*.mp4 "doc/media/examples/${example_name}/" 2>/dev/null || true
           done
           
-          # Create placeholder files for missing example outputs
-          # This ensures documentation links don't break when examples fail to generate outputs
-          
-          # Extract expected image files from documentation
-          expected_files=$(grep -roh '../../media/examples/[^)]*\.\(png\|pdf\)' doc/example/ | sed 's|../../media/examples/||' | sort -u)
-          
-          for file_path in $expected_files; do
-            full_path="doc/media/examples/$file_path"
-            if [ ! -f "$full_path" ]; then
-              echo "Creating placeholder for missing file: $file_path"
-              mkdir -p "$(dirname "$full_path")"
-              
-              # Create different placeholders based on file extension
-              if [[ "$file_path" == *.png ]]; then
-                # Create a placeholder PNG using ImageMagick or a simple text file if not available
-                if command -v convert >/dev/null 2>&1; then
-                  convert -size 640x480 xc:lightgray -pointsize 24 -draw "gravity center fill black text 0,0 'Example output not available'" "$full_path"
-                else
-                  # Fallback: create a text file that can serve as placeholder
-                  echo "Example output not available - check repository for source code" > "$full_path"
-                fi
-              elif [[ "$file_path" == *.pdf ]]; then
-                # Create a placeholder PDF or text file
-                if command -v convert >/dev/null 2>&1; then
-                  convert -size 640x480 xc:white -pointsize 20 -draw "gravity center fill black text 0,0 'PDF Example not available'" "$full_path"
-                else
-                  echo "PDF Example output not available - check repository for source code" > "$full_path"
-                fi
-              fi
-            fi
-          done
-          
           # Generate example documentation from README files
           make example ARGS="generate_example_docs"
         

README.md

@@ -418,20 +418,3 @@ time make example_matplotlib
 time make example_python
 1.35s user 0.17s system 97% cpu 1.562 total
 ```
-
----
-project: fortplot
-summary: Fortran-native plotting library inspired by matplotlib
-author: lazy-fortran contributors
-page_dir: ./doc
-media_dir: ./media
-src_dir: ./src
-exclude_dir: ./build
-exclude: fortplot_c_bindings.f90
-         fortplot_python.f90
-extensions: f90
-source: true
-graph: false
-search: true
-favicon: ./media/logo.jpg
----