chore(examples): Add id3info example

[Holzhaus]

This should help when debugging issues. Fixes #81.

[Holzhaus]

Here's some example output:

$ cargo run --example id3info -- testdata/id3v23_chap.id3
# ID3 ID3v2.3 - 17 frames
TALB="Mac Power Users"
TPE1="Mac Power Users"
TIT2="554: Read-it-later Services"
COMM:[eng]="Read-it-later services can be a great way to save and enjoy an article later, away from the noise of social media or an overflowing RSS client. This week, David and Stephen talk about some of the popular choices, and how to keep them from becoming just another thing to check. Then, a recap of Apple’s recent media event."
USLT:[eng]="Read-it-later services can be a great way to save and enjoy an article later, away from the noise of social media or an overflowing RSS client. This week, David and Stephen talk about some of the popular choices, and how to keep them from becoming just another thing to check. Then, a recap of Apple’s recent media event."
CTOC=TableOfContents(TableOfContents { element_id: "toc", top_level: true, ordered: true, elements: ["chp0", "chp1", "chp2", "chp3", "chp4", "chp5", "chp6"], frames: [] })
CHAP:chp0=<chapter, 1 frames (4294967295+0 - 4294967295+466287>
CHAP:chp1=<chapter, 1 frames (4294967295+466287 - 4294967295+964340>
CHAP:chp2=<chapter, 1 frames (4294967295+964340 - 4294967295+1597615>
CHAP:chp3=<chapter, 1 frames (4294967295+1597615 - 4294967295+3042409>
CHAP:chp4=<chapter, 1 frames (4294967295+3042409 - 4294967295+3345281>
CHAP:chp5=<chapter, 1 frames (4294967295+3345281 - 4294967295+4158417>
CHAP:chp6=<chapter, 1 frames (4294967295+4158417 - 4294967295+5997000>
TLEN="5997000"
TYER="2020"
TENC="Forecast"
APIC:Front cover=<image, image/jpeg, description "", 321286 bytes>

$ cargo run --example id3info -- testdata/id3v23_geob.id3
# ID3 ID3v2.3 - 18 frames
TIT2="All You Need (Original Mix)"
TPE1="Thoma Cher"
TALB="Far East \0 Wild West EP"
TCON="Indie Dance \0 Nu Disco"
TIT1="Whiskey Disco"
TPUB="Whiskey Disco"
TYER="2017"
TKEY="Am"
RVAD=Unknown(Unknown { data: [0, 16, 0, 0, 0, 0, 0, 0, 0, 0], version: Id3v23 })
TBPM="117"
COMM:[eng]="Purchased at Beatport.com"
GEOB:Serato Overview=<encapsulated object, application/octet-stream, filename "", 3842 bytes>
GEOB:Serato Analysis=<encapsulated object, application/octet-stream, filename "", 2 bytes>
GEOB:Serato Autotags=<encapsulated object, application/octet-stream, filename "", 21 bytes>
GEOB:Serato Markers_=<encapsulated object, application/octet-stream, filename "", 318 bytes>
GEOB:Serato Markers2=<encapsulated object, application/octet-stream, filename "", 470 bytes>
GEOB:Serato BeatGrid=<encapsulated object, application/octet-stream, filename "", 39 bytes>
GEOB:Serato Offsets_=<encapsulated object, application/octet-stream, filename "", 29829 bytes>