fix: nil-close bug, stale docs, dead code, and tracked binaries

- Fix potential nil file.Close() panic in devModePersist/devModeRemovePersisted
  by extracting loadDevModeMap/saveDevModeMap helpers with proper defer
- Remove tracked binaries (pathparams 10.8 MB, shake.db 22 MB) and consolidate
  .gitignore with a wildcard pattern covering all 19 examples
- Remove stale reaper reference in README (removed in dc56261), update example
  count from 14 to 19, fix OnChange debounce claim in docs
- Fix typos: "percist"→"persist", "percisted"→"persisted", "tmplates"→"templates"
- Remove dead code: commented import in signal_test.go, unnecessary fmt.Sprintf
  in computed.go, commented picocss imports and no-op Config calls in examples
- Replace go fmt with gofmt -l check in ci-check.sh to fail on unformatted code
  instead of silently reformatting

internal/examples/livereload/main.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"github.com/ryanhamamura/via"
-	// "github.com/go-via/via-plugin-picocss/picocss"
 	"github.com/ryanhamamura/via/h"
 )
 
@@ -15,9 +14,6 @@ func main() {
 		DocumentTitle: "Live Reload Demo",
 		DevMode:       true,
 		LogLevel:      via.LogLevelDebug,
-		Plugins:       []via.Plugin{
-			// picocss.Default
-		},
 	})
 
 	v.Page("/", func(c *via.Context) {

internal/examples/pathparams/main.go

@@ -4,17 +4,12 @@ import (
 	"strconv"
 
 	"github.com/ryanhamamura/via"
-	// "github.com/go-via/via-plugin-picocss/picocss"
 	. "github.com/ryanhamamura/via/h"
 )
 
 func main() {
 	v := via.New()
 
-	v.Config(via.Options{
-		// Plugins: []via.Plugin{picocss.Default},
-	})
-
 	v.Page("/counters/{counter_id}/{start_at_step}", func(c *via.Context) {
 
 		counterID := c.GetPathParam("counter_id")

internal/examples/picocss/main.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"github.com/ryanhamamura/via"
-	// "github.com/go-via/via-plugin-picocss/picocss"
 	"github.com/ryanhamamura/via/h"
 )
 
@@ -13,11 +12,6 @@ func main() {
 
 	v.Config(via.Options{
 		DocumentTitle: "Via Counter",
-		// Plugin is placed here. Use picocss.WithOptions(pococss.Options) to add the plugin
-		// with a different color theme or to enable a classes for a wide range of colors.
-		// Plugins: []via.Plugin{
-		// 	picocss.Default,
-		// },
 	})
 
 	v.Page("/", func(c *via.Context) {

internal/examples/realtimechart/main.go

@@ -6,7 +6,6 @@ import (
 	"time"
 
 	"github.com/ryanhamamura/via"
-	// "github.com/go-via/via-plugin-picocss/picocss"
 	"github.com/ryanhamamura/via/h"
 )
 
@@ -16,9 +15,6 @@ func main() {
 	v.Config(via.Options{
 		LogLevel: via.LogLevelDebug,
 		DevMode:  true,
-		Plugins:  []via.Plugin{
-			// picocss.Default,
-		},
 	})
 
 	v.AppendToHead(

internal/examples/shakespeare/main.go

@@ -22,6 +22,9 @@ type ShakeDB struct {
 	findByTextStmt *sql.Stmt
 }
 
+// Prepare opens shake.db, a ~22 MB SQLite database of Shakespeare's works.
+// Download from https://github.com/nicholasgasior/gopher-fizzbuzz/raw/master/shake.db
+// and place it in this directory before running.
 func (shakeDB *ShakeDB) Prepare() {
 	db, err := sql.Open("sqlite3", "shake.db")
 	if err != nil {