Add new recipes, Update existing recipes

[vedang]

This PR submits the following changes:

Updates:

1. Updates dependencies in recipe for docker: Removes the warning that docker-tramp is deprecated
2. Updates following recipes to use the main branch: keycast, pinboard
3. Updates the organizations of following github recipes: json-mode, org-noter
4. Updates dependencies in recipe for elm: The package depends on seq
5. Updates dependencies in recipe for json-mode: Remove dependency on json-refactor

Adds:

1. Adds recipe for fontaine: Font configuration presets
2. Adds recipe for ef-themes: Colorful and legible themes for GNU Emacs
3. Adds recipe for emacs-jupyter: An interface to communicate with Jupyter kernels.
4. Adds recipe for emacs-zmq: ZMQ bindings in elisp
5. Adds recipe for flowstorm: An interface to using Flowstorm via Cider
6. Adds recipe for denote-explore: a collection of functions to explore Denote files.
7. Adds recipe for emacs-dashboard: A startup screen extracted from Spacemacs. denote-explore depends on this.
8. Adds recipe for rfc-mode: An Emacs major mode to read and browse RFC documents.
9. Adds recipe for org-modern: Implements a Modern Org Style using font-locking and text-properties.

[vedang]

Closing this PR, I will re-submit them as individual PRs for easier review (so that hopefully they get merged in)