Update dotfiles (#696)

Inspired by the current dotfiles in https://github.com/crystal-lang/crystal, including the following recent changes:

* crystal-lang/crystal#16462
* crystal-lang/crystal#16263
* crystal-lang/crystal#15469
* crystal-lang/crystal#15396
* crystal-lang/crystal#13479

Author: straight-shoota

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*.{cr,ecr}]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true

.envrc

@@ -2,6 +2,10 @@
 
 *.cr text eol=lf
 
+## Sourced-in dependencies
+
+lib/** linguist-vendored
+
 ## Generated files
 
 # produced by `make manpages`
@@ -12,6 +16,10 @@ man/shard.yml.5 linguist-generated
 docs/shards.html linguist-generated
 docs/shard.yml.html linguist-generated
 
+# devenv
+.devenv.flake.nix -merge linguist-generated
+devenv.lock -merge linguist-generated
+
 ## Syntax highlighting
 
 Makefile.win linguist-language=makefile

.gitattributes

@@ -1,17 +1,42 @@
+# Environment configuration
+/Makefile.local
+/Makefile.win.local
+.env
+.env.*
+.envrc
+.envrc.*
+
+# Shards cache
 /.crystal
 /.shards
-/bin/shards
-/bin/shards.dwarf
-/bin/shards.exe
-/bin/shards.pdb
+
+# Test artifacts
 /spec/.repositories
-/spec/.shards
 /spec/unit/.lib
-/tmp
+/spec/.shards
+
+# Build artifacts
+/bin/shards
+*.o
+*.ll
+*.s
+*.obj
+*.dwo
+*.dwarf
+*.pdb
+*.exe
 /docs/*.html
+/man/*.gz
+
+# CI
+/coverage/
+/tmp/
+/.junit/
+
 # Devenv
 .devenv*
 devenv.local.nix
+devenv.local.yaml
 
 # direnv
 .direnv

.gitignore

@@ -0,0 +1,7 @@
+Beta Ziliani <beta@manas.tech> <beta@mpi-sws.org>
+Brian J. Cardiff <bcardiff@gmail.com> <bcardiff@manas.com.ar>
+Brian J. Cardiff <bcardiff@gmail.com> <bcardiff@manas.tech>
+Kim Burgess <kim@simple.industries> <kim@place.technology>
+Luis Lavena <luislavena@gmail.com> <luislavena@users.noreply.github.com
+Stephanie Hobbs <steph@rx14.co.uk> <chris@rx14.co.uk>
+Stephanie Hobbs <steph@rx14.co.uk> <steph@rx14.co.uk>