Add examples/all which imports every package

This is useful for knowing what exists and producing documentation with `odin doc`

examples/all/all_main.odin

@@ -0,0 +1,58 @@
+package all
+
+// Imports every package
+// This is useful for knowing what exists and producing documentation with `odin doc`
+
+import "core:bufio"
+import "core:bytes"
+import "core:c"
+import c_tokenizer "core:c/frontend/tokenizer"
+import c_preprocessor "core:c/frontend/preprocessor"
+import "core:compress"
+import "core:compress/gzip"
+import "core:compress/zlib"
+import "core:container"
+import "core:dynlib"
+import "core:encoding"
+import "core:encoding/base32"
+import "core:encoding/base64"
+import "core:encoding/cel"
+import "core:encoding/csv"
+import "core:encoding/json"
+import "core:fmt"
+import "core:hash"
+import "core:image"
+import "core:image/png"
+import "core:io"
+import "core:log"
+import "core:math"
+import "core:math/bits"
+import "core:math/fixed"
+import "core:math/linalg"
+import "core:math/rand"
+import "core:mem"
+import "core:odin/ast"
+import doc_format "core:odin/doc-format"
+import "core:odin/format"
+import "core:odin/parser"
+import "core:odin/printer"
+import odin_tokenizer "core:odin/tokenizer"
+import "core:os"
+import "core:path"
+import "core:path/filepath"
+import "core:reflect"
+import "core:runtime"
+import "core:slice"
+import "core:sort"
+import "core:strconv"
+import "core:strings"
+import "core:sync"
+import "core:sync/sync2"
+import "core:text/scanner"
+import "core:thread"
+import "core:time"
+import "core:unicode"
+import "core:unicode/utf8"
+import "core:unicode/utf16"
+
+main :: proc(){}