chore: misc (#100) (this makes 2.0.0)

Co-authored-by: grialion <48643945+grialion@users.noreply.github.com>

- Fix license ambiguity (#88)
  - just the only/or-later ambiguity point, not adding SPDX identifyiers unless more people request it
- Better document kmscon (#91)
- Make 2.0.0 already to close #86
- Add a changelog
- Add packagers info (acutally just add them to install guide)
- Add AUR service packages (I'll take care of systemd and dinit, let others package the rest and leave systemd open for someone who actually uses it in docs)
- Make sure all makefile installs to `/usr/local` by default
- Simplify Makefile complexity by several orders

assets/pkg/aur/lidm-git/.SRCINFO

@@ -1,12 +1,13 @@
 pkgbase = lidm-git
 	pkgdesc = A fully colorful customizable TUI display manager made in C. (last git commit)
-	pkgver = 1.2.3.r3.g363deea
-	pkgrel = 3
+	pkgver = 1.2.3.r12.g7e7a297
+	pkgrel = 1
 	url = https://github.com/javalsai/lidm
 	arch = any
-	license = GPL
+	license = GPL-3.0-only
 	makedepends = git
 	depends = pam
+	depends = lidm-service
 	provides = lidm
 	conflicts = lidm
 	source = lidm::git+https://github.com/javalsai/lidm

assets/pkg/aur/lidm-git/PKGBUILD

@@ -1,14 +1,14 @@
 # shellcheck disable=SC2034,SC2154,SC2164
 # Maintainer: javalsai <javalsai@proton.me>
 pkgname=lidm-git
-pkgver=1.2.3.r3.g363deea
-pkgrel=3
-depends=('pam')
+pkgver=1.2.3.r13.g9cf5297
+pkgrel=1
+depends=('pam' 'lidm-service')
 makedepends=('git')
 pkgdesc="A fully colorful customizable TUI display manager made in C. (last git commit)"
 arch=('any')
 url="https://github.com/javalsai/lidm"
-license=('GPL')
+license=('GPL-3.0-only')
 provides=('lidm')
 conflicts=('lidm')
 source=("lidm::git+https://github.com/javalsai/lidm")