feat: add project initialization script and template files with dynamic help table

- Added `init-project` script to setup new taskfile projects with templates
- Created `.gitignore.template` and `AGENTS.md.template` for standardized project setup
- Implemented dynamic help table generation in `help-table` function
- Updated `library.md` and `task.template` to include new `init-project` command
- Added `init-project` to taskfile help documentation
- Improved AGENTS.md with comprehensive coding conventions and agent guidance

task

@@ -2,25 +2,47 @@
 set -e
 
 help-table() {
-    local cmd_width=20
-    local opt_width=10
-    local desc_width=42
-    local column="| %-${cmd_width}s | %-${opt_width}s | %-${desc_width}s |\n"
+    local -a rows
+    local max_cmd=7 max_opt=6 max_desc=11
 
-    printf "$column" 'Command' 'Option' 'Description'
-    echo "|$(printf '%*s' $((cmd_width + 2)) '' | tr ' ' '-')|$(printf '%*s' $((opt_width + 2)) '' | tr ' ' '-')|$(printf '%*s' $((desc_width + 2)) '' | tr ' ' '-')|"
-    printf "$column" 'all' '' 'Run all tasks.'
-    printf "$column" 'build-11ty' '' 'Build the 11ty website.'
-    printf "$column" 'build-image' '[output]' 'Build Docker image with buildx.'
-    printf "$column" 'commit-with-llm' '' 'Commit with llm generated commit message.'
-    printf "$column" 'dev-11ty' '' 'Run 11ty server.'
-    printf "$column" 'help' '[grep]' 'Show help for commands.'
-    printf "$column" 'install' '' 'Install node packages.'
-    printf "$column" 'lint' '' 'Lint code with prettier.'
-    printf "$column" 'run' '' 'Run Docker image.'
-    printf "$column" 'run-tests' '' 'Test with shellcheck.'
-    printf "$column" 'serve-11ty' '' 'Serve the 11ty output folder.'
-    printf "$column" 'version' '' 'Show version of required tools.'
+    rows+=("Command|Option|Description")
+    rows+=("all||Run all tasks.")
+    rows+=("build-11ty||Build the 11ty website.")
+    rows+=("build-image|[output]|Build Docker image with buildx.")
+    rows+=("commit-with-llm||Commit with llm generated commit message.")
+    rows+=("dev-11ty||Run 11ty server.")
+    rows+=("help|[grep]|Show help for commands.")
+    rows+=("install||Install node packages.")
+    rows+=("lint||Lint code with prettier.")
+    rows+=("run||Run Docker image.")
+    rows+=("run-tests||Test with shellcheck.")
+    rows+=("serve-11ty||Serve the 11ty output folder.")
+    rows+=("version||Show version of required tools.")
+
+    for row in "${rows[@]}"; do
+        IFS='|' read -r cmd opt desc <<< "$row"
+        (( ${#cmd} > max_cmd )) && max_cmd=${#cmd}
+        (( ${#opt} > max_opt )) && max_opt=${#opt}
+        (( ${#desc} > max_desc )) && max_desc=${#desc}
+    done
+
+    printf '| %-*s | %-*s | %-*s |\n' \
+        "$max_cmd" "Command" \
+        "$max_opt" "Option" \
+        "$max_desc" "Description"
+
+    printf '|-%*s-|-%*s-|-%*s-|\n' \
+        "$max_cmd" "$(printf '%*s' "$max_cmd" '' | tr ' ' '-')" \
+        "$max_opt" "$(printf '%*s' "$max_opt" '' | tr ' ' '-')" \
+        "$max_desc" "$(printf '%*s' "$max_desc" '' | tr ' ' '-')"
+
+    for row in "${rows[@]:1}"; do
+        IFS='|' read -r cmd opt desc <<< "$row"
+        printf '| %-*s | %-*s | %-*s |\n' \
+            "$max_cmd" "$cmd" \
+            "$max_opt" "$opt" \
+            "$max_desc" "$desc"
+    done
 }
 
 help() {