Fix README formatting

Dependencies

• [2] WJROXZ3C Add note to README thanking mgattozzi
• [3] J4PKMKJX Add root doc comment, gemtext module
• [4] BOFUYB6I Add documentation and implement some feedback from Discord (https://discord.com/channels/273534239310479360/354038657075904544/796256815024701480)
• [5] 5II6T7YE Add gemini library
• [6] JS6JZ7IA Add an initial planned feature list for `gemini`
• [7] NKDEPTTN Fix typo
• [*] L6GZJGTU Add READMEs

Change contents

• replacement in gemini/README.md at line 8
  [3.99]→[3.6662:6801](∅→∅),[3.6801]→[2.0:44](∅→∅)
  − [X] a `gemtext` module for representing `text/gemini` content

  − [ ] parsers using `nom`

  − [ ] streaming response bodies

  − [ ] no_std support

  − [ ] improve doc comments with links n such
  [3.99]

  [2.44]
  + - [x] a `gemtext` module for representing `text/gemini` content

  + - [ ] parsers using `nom`

  + - [ ] streaming response bodies

  + - [ ] `no_std` support

  + - [ ] improve doc comments with links n such
• replacement in Cargo.lock at line 140
  [3.13299]→[3.13299:13317](∅→∅)
  − version = "0.1.0"
  [3.13299]

  [3.13317]
  + version = "0.0.2"