Merge bitcoindevkit/bdk-cli#72: Add resources section to readme

63b472b2db526d2685147b4c885d27ea28855735 Add episode on the Bitcoin Developers Show to resources (thunderbiscuit)
8d9fdbdd3004a2852308af9f476e6e0736c065a1 Add resources section to readme (thunderbiscuit)

Pull request description:

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  ### Description
  This PR adds a Resources section with links to resources, currently the docs on the bitcoindevkit.org website and the Tutorial series I made which is on youtube. Once Steve does the show with Conor next week we could add that to the list as well!

  ### Checklists
  * [x] I've signed all my commits

ACKs for top commit:
  rajarshimaitra:
    ReACK https://github.com/bitcoindevkit/bdk-cli/pull/72/commits/63b472b2db526d2685147b4c885d27ea28855735

Tree-SHA512: 321fb99021dc63375b80d8caeebf255bbe03fe07d9afd65d0274a7051b91908525534c65926160601599e2d7081df3f71cae4f78777c3a5414bef650561aa91a