pidgin/nest

Unify contents of contributing section into a single page

2021-07-04, Sorvival
74890bc9a66d
Unify contents of contributing section into a single page

- Add some basic content to the index of the development section so that
it's not empty
- Remove contributing/mercurial page since its contents are now in the docs
page for using mercurial or in the (now single) contributing page.
- Add section in contributing page that points to useful link on how to
contribute code.
- Minor cleanups in the pre-existing contributing page
- Fix broken link in about index page that appeared after moving the
contributing section into a single page.

Testing Done:
Ran dev-server.sh and verified contents of the website looked as intended

Bugs closed: NEST-33

Reviewed at https://reviews.imfreedom.org/r/789/
{
"version": "0.1",
"language": "en",
"words": [],
"dictionaryDefinitions": [
{
"name": "Pidgin",
"path": "./tools/pidgin-words.txt"
}
],
"dictionaries": [
"Pidgin",
"en-us",
"en-gb",
"companies"
],
"flagWords": [],
"ignorePaths": [
"node_modules/**",
"hugo/themes/learn/**",
"hugo/public/**",
"public/**",
"tools/paths.txt",
"package-lock.json",
"package.json",
"hugo/data/**/*",
"convey.yml"
],
"overrides": [
{
"filename": "hugo/content/**/*.es.md",
"language": "es"
}
],
"enabledLanguageIds": [
"css",
"dockerfile",
"html",
"javascript",
"json",
"jsonc",
"markdown",
"plaintext",
"python",
"scss",
"text",
"toml",
"yaml",
"yml"
]
}