Add contributing guidelines, a COC and EditorConfig.

.editorconfig

@@ -0,0 +1,13 @@
+# Configuration file for EditorConfig.
+# More information is available under <https://editorconfig.org/>.
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+max_line_length = 80

CODE_OF_CONDUCT.adoc

@@ -0,0 +1,49 @@
+:coc_contact: tastytea@tastytea.de
+
+== Code of Conduct
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, education, ethnicity, gender identity and expression, level of
+experience, nationality, personal appearance, race, religion, sex
+characteristics, sexual identity and orientation or socio-economic status.
+
+=== Examples
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language.
+* Being respectful of differing viewpoints and experiences.
+* Gracefully accepting constructive criticism.
+* Focusing on what is best for the community.
+* Showing empathy towards other community members.
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+  advances.
+* Trolling, insulting/derogatory comments, and personal attacks.
+* Public or private harassment.
+* Publishing others’ private information, such as a physical or electronic
+  address, without explicit permission.
+
+=== Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at {coc_contact}.
+
+All complaints will be reviewed and investigated and will result in a response
+that is deemed necessary and appropriate to the circumstances. The project team
+is obligated to maintain confidentiality with regard to the reporter of an
+incident.
+
+=== Attribution
+
+This Code of Conduct is adapted from the Contributor Covenant, version 1.4,
+available at
+https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
+
+For answers to common questions about this code of conduct, see
+https://www.contributor-covenant.org/faq

CONTRIBUTING.adoc

@@ -0,0 +1,22 @@
+:project: mastodon-cpp
+
+== How to contribute
+
+Read the link:CODE_OF_CONDUCT.adoc[Code of Conduct].
+
+=== Reporting bugs or suggesting enhancements
+
+Before reporting a bug, please
+https://schlomp.space/tastytea/{project}/issues[perform a search] to see if the
+problem has already been reported. If it has, add a comment to the existing
+issue instead of opening a new one. Same for enhancements.
+
+You can also contact me via mailto:tastytea@tastytea.de[E-Mail],
+link:xmpp:tastytea@tastytea.de[XMPP] or the
+https://likeable.space/users/tastytea[Fediverse] if you don't want to open an
+account.
+
+=== Pull requests
+
+Please use similar coding conventions as the rest of the project. The basic rule
+to remember is to write code in the same style as the existing/surrounding code.

CONTRIBUTING.md

@@ -1,16 +0,0 @@
-# How to contribute
-
-## Reporting bugs or suggesting enhancements
-
-Before reporting a bug , please
-[perform a search](https://schlomp.space/tastytea/mastodon-cpp/issues)
-to see if the problem has already been reported. If it has, add a comment to the
-existing issue instead of opening a new one. Same for enhancements.
-
-You can also contact me via the Fediverse if you don't want to open an account.
-My account is [@tastytea@likeable.space](https://likeable.space/users/tastytea).
-
-## Pull requests
-
-Please use similar coding conventions as the rest of the project. The basic rule
-to remember is to write code in the same style as the existing/surrounding code.

README.adoc

@@ -1,5 +1,6 @@
 = mastodon-cpp
 :toc: preamble
+:project: mastodon-cpp
 
 *mastodon-cpp* is a C++ wrapper for the Mastodon API. You submit an API call
 and get the raw JSON or easy to use abstractions.
@@ -256,6 +257,11 @@ the filter ID with `MASTODON_CPP_FILTER_ID`. You can select the list ID with
 * Have at least 1 list with at least one account in it.
 * have at least 1 account muted.
 
+== Contributing
+
+See
+https://schlomp.space/tastytea/{project}/src/branch/main/CONTRIBUTING.adoc[CONTRIBUTING.adoc].
+
 == Status of implementation
 
 You can still use unsupported calls by using `API::get` and the others with